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Finding the Fourth Proportional to 651,787.80, 977,681.70 and 440,280.60

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Solution

The fourth proportional to 651,787.80, 977,681.70 and 440,280.60 is: 660,420.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,787.80 : 977,681.70 = 440,280.60 : x
  2. Step 2: Convert to fraction form
    651,787.80/977,681.70 = 440,280.60/x
  3. Step 3: Cross multiply
    651,787.80x = 977,681.70 × 440,280.60
  4. Step 4: Simplify right side
    651,787.80x = 430,454,285,485.02
  5. Step 5: Solve for x
    x = 430,454,285,485.02/651,787.80
  6. Step 6: Final answer
    x = 660,420.90

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Half scale
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Double scale
Find fourth proportional to 651,788.80, 977,683.20 and 440,281.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.