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Finding the Fourth Proportional to 666,401.75, 918,677.89 and 475,082.99

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Solution

The fourth proportional to 666,401.75, 918,677.89 and 475,082.99 is: 654,932.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,401.75 : 918,677.89 = 475,082.99 : x
  2. Step 2: Convert to fraction form
    666,401.75/918,677.89 = 475,082.99/x
  3. Step 3: Cross multiply
    666,401.75x = 918,677.89 × 475,082.99
  4. Step 4: Simplify right side
    666,401.75x = 436,448,231,859.29
  5. Step 5: Solve for x
    x = 436,448,231,859.29/666,401.75
  6. Step 6: Final answer
    x = 654,932.61

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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.