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Finding the Fourth Proportional to 666,429.47, 918,716.13 and 475,110.71

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Solution

The fourth proportional to 666,429.47, 918,716.13 and 475,110.71 is: 654,970.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,429.47 : 918,716.13 = 475,110.71 : x
  2. Step 2: Convert to fraction form
    666,429.47/918,716.13 = 475,110.71/x
  3. Step 3: Cross multiply
    666,429.47x = 918,716.13 × 475,110.71
  4. Step 4: Simplify right side
    666,429.47x = 436,491,868,219.17
  5. Step 5: Solve for x
    x = 436,491,868,219.17/666,429.47
  6. Step 6: Final answer
    x = 654,970.84

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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.