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Finding the Fourth Proportional to 666,405.63, 918,683.22 and 475,086.87

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Solution

The fourth proportional to 666,405.63, 918,683.22 and 475,086.87 is: 654,937.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,405.63 : 918,683.22 = 475,086.87 : x
  2. Step 2: Convert to fraction form
    666,405.63/918,683.22 = 475,086.87/x
  3. Step 3: Cross multiply
    666,405.63x = 918,683.22 × 475,086.87
  4. Step 4: Simplify right side
    666,405.63x = 436,454,335,511.32
  5. Step 5: Solve for x
    x = 436,454,335,511.32/666,405.63
  6. Step 6: Final answer
    x = 654,937.95

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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.