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Finding the Fourth Proportional to 498,412.80, 687,785.64 and 283,532.64

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Solution

The fourth proportional to 498,412.80, 687,785.64 and 283,532.64 is: 391,261.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,412.80 : 687,785.64 = 283,532.64 : x
  2. Step 2: Convert to fraction form
    498,412.80/687,785.64 = 283,532.64/x
  3. Step 3: Cross multiply
    498,412.80x = 687,785.64 × 283,532.64
  4. Step 4: Simplify right side
    498,412.80x = 195,009,678,263.29
  5. Step 5: Solve for x
    x = 195,009,678,263.29/498,412.80
  6. Step 6: Final answer
    x = 391,261.38

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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.