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Finding the Fourth Proportional to 499,297.28, 688,488.38 and 317,776.97

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Solution

The fourth proportional to 499,297.28, 688,488.38 and 317,776.97 is: 438,187.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,297.28 : 688,488.38 = 317,776.97 : x
  2. Step 2: Convert to fraction form
    499,297.28/688,488.38 = 317,776.97/x
  3. Step 3: Cross multiply
    499,297.28x = 688,488.38 × 317,776.97
  4. Step 4: Simplify right side
    499,297.28x = 218,785,746,245.28
  5. Step 5: Solve for x
    x = 218,785,746,245.28/499,297.28
  6. Step 6: Final answer
    x = 438,187.34

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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.