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Finding the Fourth Proportional to 530,391.29, 731,955.50 and 288,689.52

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Solution

The fourth proportional to 530,391.29, 731,955.50 and 288,689.52 is: 398,399.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,391.29 : 731,955.50 = 288,689.52 : x
  2. Step 2: Convert to fraction form
    530,391.29/731,955.50 = 288,689.52/x
  3. Step 3: Cross multiply
    530,391.29x = 731,955.50 × 288,689.52
  4. Step 4: Simplify right side
    530,391.29x = 211,307,881,956.36
  5. Step 5: Solve for x
    x = 211,307,881,956.36/530,391.29
  6. Step 6: Final answer
    x = 398,399.98

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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.