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Finding the Fourth Proportional to 712,379.32, 983,046.80 and 390,027.06

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Solution

The fourth proportional to 712,379.32, 983,046.80 and 390,027.06 is: 538,217.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,379.32 : 983,046.80 = 390,027.06 : x
  2. Step 2: Convert to fraction form
    712,379.32/983,046.80 = 390,027.06/x
  3. Step 3: Cross multiply
    712,379.32x = 983,046.80 × 390,027.06
  4. Step 4: Simplify right side
    712,379.32x = 383,414,854,221.48
  5. Step 5: Solve for x
    x = 383,414,854,221.48/712,379.32
  6. Step 6: Final answer
    x = 538,217.27

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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.