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Finding the Fourth Proportional to 571,318.34, 857,407.70 and 390,972.02

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Solution

The fourth proportional to 571,318.34, 857,407.70 and 390,972.02 is: 586,752.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,318.34 : 857,407.70 = 390,972.02 : x
  2. Step 2: Convert to fraction form
    571,318.34/857,407.70 = 390,972.02/x
  3. Step 3: Cross multiply
    571,318.34x = 857,407.70 × 390,972.02
  4. Step 4: Simplify right side
    571,318.34x = 335,222,417,122.95
  5. Step 5: Solve for x
    x = 335,222,417,122.95/571,318.34
  6. Step 6: Final answer
    x = 586,752.42

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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.