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Finding the Fourth Proportional to 324,931.40, 487,224.30 and 137,731.40

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Solution

The fourth proportional to 324,931.40, 487,224.30 and 137,731.40 is: 206,523.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,931.40 : 487,224.30 = 137,731.40 : x
  2. Step 2: Convert to fraction form
    324,931.40/487,224.30 = 137,731.40/x
  3. Step 3: Cross multiply
    324,931.40x = 487,224.30 × 137,731.40
  4. Step 4: Simplify right side
    324,931.40x = 67,106,084,953.02
  5. Step 5: Solve for x
    x = 67,106,084,953.02/324,931.40
  6. Step 6: Final answer
    x = 206,523.85

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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.