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Finding the Fourth Proportional to 498,534.36, 687,453.66 and 328,551

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Solution

The fourth proportional to 498,534.36, 687,453.66 and 328,551 is: 453,055.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,534.36 : 687,453.66 = 328,551 : x
  2. Step 2: Convert to fraction form
    498,534.36/687,453.66 = 328,551/x
  3. Step 3: Cross multiply
    498,534.36x = 687,453.66 × 328,551
  4. Step 4: Simplify right side
    498,534.36x = 225,863,587,446.66
  5. Step 5: Solve for x
    x = 225,863,587,446.66/498,534.36
  6. Step 6: Final answer
    x = 453,055.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.