Home / 530,397.78-731,966.90-288,689.12

Finding the Fourth Proportional to 530,397.78, 731,966.90 and 288,689.12

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Solution

The fourth proportional to 530,397.78, 731,966.90 and 288,689.12 is: 398,400.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,397.78 : 731,966.90 = 288,689.12 : x
  2. Step 2: Convert to fraction form
    530,397.78/731,966.90 = 288,689.12/x
  3. Step 3: Cross multiply
    530,397.78x = 731,966.90 × 288,689.12
  4. Step 4: Simplify right side
    530,397.78x = 211,310,875,126.85
  5. Step 5: Solve for x
    x = 211,310,875,126.85/530,397.78
  6. Step 6: Final answer
    x = 398,400.75

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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.