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Finding the Fourth Proportional to 712,597.29, 983,384.36 and 390,318.90

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Solution

The fourth proportional to 712,597.29, 983,384.36 and 390,318.90 is: 538,640.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,597.29 : 983,384.36 = 390,318.90 : x
  2. Step 2: Convert to fraction form
    712,597.29/983,384.36 = 390,318.90/x
  3. Step 3: Cross multiply
    712,597.29x = 983,384.36 × 390,318.90
  4. Step 4: Simplify right side
    712,597.29x = 383,833,501,672.40
  5. Step 5: Solve for x
    x = 383,833,501,672.40/712,597.29
  6. Step 6: Final answer
    x = 538,640.14

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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.