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Finding the Fourth Proportional to 712,548.60, 983,279.57 and 390,251.83

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Solution

The fourth proportional to 712,548.60, 983,279.57 and 390,251.83 is: 538,526.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,548.60 : 983,279.57 = 390,251.83 : x
  2. Step 2: Convert to fraction form
    712,548.60/983,279.57 = 390,251.83/x
  3. Step 3: Cross multiply
    712,548.60x = 983,279.57 × 390,251.83
  4. Step 4: Simplify right side
    712,548.60x = 383,726,651,594.11
  5. Step 5: Solve for x
    x = 383,726,651,594.11/712,548.60
  6. Step 6: Final answer
    x = 538,526.99

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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.