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Finding the Fourth Proportional to 666,426.38, 918,711.87 and 475,107.62

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Solution

The fourth proportional to 666,426.38, 918,711.87 and 475,107.62 is: 654,966.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,426.38 : 918,711.87 = 475,107.62 : x
  2. Step 2: Convert to fraction form
    666,426.38/918,711.87 = 475,107.62/x
  3. Step 3: Cross multiply
    666,426.38x = 918,711.87 × 475,107.62
  4. Step 4: Simplify right side
    666,426.38x = 436,487,005,427.89
  5. Step 5: Solve for x
    x = 436,487,005,427.89/666,426.38
  6. Step 6: Final answer
    x = 654,966.58

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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.