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Finding the Fourth Proportional to 623,137.80, 934,706.70 and 385,710.60

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Solution

The fourth proportional to 623,137.80, 934,706.70 and 385,710.60 is: 578,565.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,137.80 : 934,706.70 = 385,710.60 : x
  2. Step 2: Convert to fraction form
    623,137.80/934,706.70 = 385,710.60/x
  3. Step 3: Cross multiply
    623,137.80x = 934,706.70 × 385,710.60
  4. Step 4: Simplify right side
    623,137.80x = 360,526,282,081.02
  5. Step 5: Solve for x
    x = 360,526,282,081.02/623,137.80
  6. Step 6: Final answer
    x = 578,565.90

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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.