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Finding the Fourth Proportional to 666,381.18, 918,649.49 and 475,062.42

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Solution

The fourth proportional to 666,381.18, 918,649.49 and 475,062.42 is: 654,904.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,381.18 : 918,649.49 = 475,062.42 : x
  2. Step 2: Convert to fraction form
    666,381.18/918,649.49 = 475,062.42/x
  3. Step 3: Cross multiply
    666,381.18x = 918,649.49 × 475,062.42
  4. Step 4: Simplify right side
    666,381.18x = 436,415,847,475.85
  5. Step 5: Solve for x
    x = 436,415,847,475.85/666,381.18
  6. Step 6: Final answer
    x = 654,904.22

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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.