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Finding the Fourth Proportional to 389,513.32, 584,334.54 and 136,728.19

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Solution

The fourth proportional to 389,513.32, 584,334.54 and 136,728.19 is: 205,114.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,513.32 : 584,334.54 = 136,728.19 : x
  2. Step 2: Convert to fraction form
    389,513.32/584,334.54 = 136,728.19/x
  3. Step 3: Cross multiply
    389,513.32x = 584,334.54 × 136,728.19
  4. Step 4: Simplify right side
    389,513.32x = 79,895,004,008.68
  5. Step 5: Solve for x
    x = 79,895,004,008.68/389,513.32
  6. Step 6: Final answer
    x = 205,114.95

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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.