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Finding the Fourth Proportional to 690,398.80, 952,651.20 and 403,864.72

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Solution

The fourth proportional to 690,398.80, 952,651.20 and 403,864.72 is: 557,275.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,398.80 : 952,651.20 = 403,864.72 : x
  2. Step 2: Convert to fraction form
    690,398.80/952,651.20 = 403,864.72/x
  3. Step 3: Cross multiply
    690,398.80x = 952,651.20 × 403,864.72
  4. Step 4: Simplify right side
    690,398.80x = 384,742,210,145.66
  5. Step 5: Solve for x
    x = 384,742,210,145.66/690,398.80
  6. Step 6: Final answer
    x = 557,275.32

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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.