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Finding the Fourth Proportional to 499,321.40, 748,987.56 and 144,338.49

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Solution

The fourth proportional to 499,321.40, 748,987.56 and 144,338.49 is: 216,509.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,321.40 : 748,987.56 = 144,338.49 : x
  2. Step 2: Convert to fraction form
    499,321.40/748,987.56 = 144,338.49/x
  3. Step 3: Cross multiply
    499,321.40x = 748,987.56 × 144,338.49
  4. Step 4: Simplify right side
    499,321.40x = 108,107,733,439.18
  5. Step 5: Solve for x
    x = 108,107,733,439.18/499,321.40
  6. Step 6: Final answer
    x = 216,509.32

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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.