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Finding the Fourth Proportional to 708,561.90, 977,792.67 and 386,266.86

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Solution

The fourth proportional to 708,561.90, 977,792.67 and 386,266.86 is: 533,035.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,561.90 : 977,792.67 = 386,266.86 : x
  2. Step 2: Convert to fraction form
    708,561.90/977,792.67 = 386,266.86/x
  3. Step 3: Cross multiply
    708,561.90x = 977,792.67 × 386,266.86
  4. Step 4: Simplify right side
    708,561.90x = 377,688,904,371.92
  5. Step 5: Solve for x
    x = 377,688,904,371.92/708,561.90
  6. Step 6: Final answer
    x = 533,035.86

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.