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Finding the Fourth Proportional to 572,489.40, 858,474.90 and 217,385.40

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Solution

The fourth proportional to 572,489.40, 858,474.90 and 217,385.40 is: 325,979.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,489.40 : 858,474.90 = 217,385.40 : x
  2. Step 2: Convert to fraction form
    572,489.40/858,474.90 = 217,385.40/x
  3. Step 3: Cross multiply
    572,489.40x = 858,474.90 × 217,385.40
  4. Step 4: Simplify right side
    572,489.40x = 186,619,909,526.46
  5. Step 5: Solve for x
    x = 186,619,909,526.46/572,489.40
  6. Step 6: Final answer
    x = 325,979.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.