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Finding the Fourth Proportional to 400,812.84, 553,221.54 and 231,149.16

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Solution

The fourth proportional to 400,812.84, 553,221.54 and 231,149.16 is: 319,043.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,812.84 : 553,221.54 = 231,149.16 : x
  2. Step 2: Convert to fraction form
    400,812.84/553,221.54 = 231,149.16/x
  3. Step 3: Cross multiply
    400,812.84x = 553,221.54 × 231,149.16
  4. Step 4: Simplify right side
    400,812.84x = 127,876,694,264.91
  5. Step 5: Solve for x
    x = 127,876,694,264.91/400,812.84
  6. Step 6: Final answer
    x = 319,043.41

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1.5x scale

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.