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Finding the Fourth Proportional to 651,787.20, 977,680.80 and 439,210.80

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Solution

The fourth proportional to 651,787.20, 977,680.80 and 439,210.80 is: 658,816.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,787.20 : 977,680.80 = 439,210.80 : x
  2. Step 2: Convert to fraction form
    651,787.20/977,680.80 = 439,210.80/x
  3. Step 3: Cross multiply
    651,787.20x = 977,680.80 × 439,210.80
  4. Step 4: Simplify right side
    651,787.20x = 429,407,966,312.64
  5. Step 5: Solve for x
    x = 429,407,966,312.64/651,787.20
  6. Step 6: Final answer
    x = 658,816.20

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Half scale
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Double scale
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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.