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Finding the Fourth Proportional to 531,121.52, 732,938.28 and 289,405.76

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Solution

The fourth proportional to 531,121.52, 732,938.28 and 289,405.76 is: 399,374.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,121.52 : 732,938.28 = 289,405.76 : x
  2. Step 2: Convert to fraction form
    531,121.52/732,938.28 = 289,405.76/x
  3. Step 3: Cross multiply
    531,121.52x = 732,938.28 × 289,405.76
  4. Step 4: Simplify right side
    531,121.52x = 212,116,559,956.49
  5. Step 5: Solve for x
    x = 212,116,559,956.49/531,121.52
  6. Step 6: Final answer
    x = 399,374.82

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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.