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Finding the Fourth Proportional to 666,406.38, 918,684.25 and 475,087.62

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Solution

The fourth proportional to 666,406.38, 918,684.25 and 475,087.62 is: 654,938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,406.38 : 918,684.25 = 475,087.62 : x
  2. Step 2: Convert to fraction form
    666,406.38/918,684.25 = 475,087.62/x
  3. Step 3: Cross multiply
    666,406.38x = 918,684.25 × 475,087.62
  4. Step 4: Simplify right side
    666,406.38x = 436,455,513,863.99
  5. Step 5: Solve for x
    x = 436,455,513,863.99/666,406.38
  6. Step 6: Final answer
    x = 654,938.98

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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.