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Finding the Fourth Proportional to 389,327.10, 583,990.65 and 386,702.70

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Solution

The fourth proportional to 389,327.10, 583,990.65 and 386,702.70 is: 580,054.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,327.10 : 583,990.65 = 386,702.70 : x
  2. Step 2: Convert to fraction form
    389,327.10/583,990.65 = 386,702.70/x
  3. Step 3: Cross multiply
    389,327.10x = 583,990.65 × 386,702.70
  4. Step 4: Simplify right side
    389,327.10x = 225,830,761,129.76
  5. Step 5: Solve for x
    x = 225,830,761,129.76/389,327.10
  6. Step 6: Final answer
    x = 580,054.05

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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.