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Finding the Fourth Proportional to 572,073.96, 789,607.18 and 390,859.12

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Solution

The fourth proportional to 572,073.96, 789,607.18 and 390,859.12 is: 539,484.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,073.96 : 789,607.18 = 390,859.12 : x
  2. Step 2: Convert to fraction form
    572,073.96/789,607.18 = 390,859.12/x
  3. Step 3: Cross multiply
    572,073.96x = 789,607.18 × 390,859.12
  4. Step 4: Simplify right side
    572,073.96x = 308,625,167,520.48
  5. Step 5: Solve for x
    x = 308,625,167,520.48/572,073.96
  6. Step 6: Final answer
    x = 539,484.73

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Double scale
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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.