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Finding the Fourth Proportional to 331,001.71, 455,348.97 and 289,981.10

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Solution

The fourth proportional to 331,001.71, 455,348.97 and 289,981.10 is: 398,918.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,001.71 : 455,348.97 = 289,981.10 : x
  2. Step 2: Convert to fraction form
    331,001.71/455,348.97 = 289,981.10/x
  3. Step 3: Cross multiply
    331,001.71x = 455,348.97 × 289,981.10
  4. Step 4: Simplify right side
    331,001.71x = 132,042,596,342.84
  5. Step 5: Solve for x
    x = 132,042,596,342.84/331,001.71
  6. Step 6: Final answer
    x = 398,918.17

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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.