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Finding the Fourth Proportional to 387,535.64, 580,989.78 and 121,159.04

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Solution

The fourth proportional to 387,535.64, 580,989.78 and 121,159.04 is: 181,640.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,535.64 : 580,989.78 = 121,159.04 : x
  2. Step 2: Convert to fraction form
    387,535.64/580,989.78 = 121,159.04/x
  3. Step 3: Cross multiply
    387,535.64x = 580,989.78 × 121,159.04
  4. Step 4: Simplify right side
    387,535.64x = 70,392,163,994.61
  5. Step 5: Solve for x
    x = 70,392,163,994.61/387,535.64
  6. Step 6: Final answer
    x = 181,640.49

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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.