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Finding the Fourth Proportional to 389,697.72, 584,572.98 and 136,947.48

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Solution

The fourth proportional to 389,697.72, 584,572.98 and 136,947.48 is: 205,430.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,697.72 : 584,572.98 = 136,947.48 : x
  2. Step 2: Convert to fraction form
    389,697.72/584,572.98 = 136,947.48/x
  3. Step 3: Cross multiply
    389,697.72x = 584,572.98 × 136,947.48
  4. Step 4: Simplify right side
    389,697.72x = 80,055,796,487.09
  5. Step 5: Solve for x
    x = 80,055,796,487.09/389,697.72
  6. Step 6: Final answer
    x = 205,430.50

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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.