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Finding the Fourth Proportional to 389,726.72, 584,616.48 and 136,976.48

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Solution

The fourth proportional to 389,726.72, 584,616.48 and 136,976.48 is: 205,474.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,726.72 : 584,616.48 = 136,976.48 : x
  2. Step 2: Convert to fraction form
    389,726.72/584,616.48 = 136,976.48/x
  3. Step 3: Cross multiply
    389,726.72x = 584,616.48 × 136,976.48
  4. Step 4: Simplify right side
    389,726.72x = 80,078,707,580.39
  5. Step 5: Solve for x
    x = 80,078,707,580.39/389,726.72
  6. Step 6: Final answer
    x = 205,474.00

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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.