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Finding the Fourth Proportional to 666,451.56, 918,746.46 and 475,132.80

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Solution

The fourth proportional to 666,451.56, 918,746.46 and 475,132.80 is: 655,001.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,451.56 : 918,746.46 = 475,132.80 : x
  2. Step 2: Convert to fraction form
    666,451.56/918,746.46 = 475,132.80/x
  3. Step 3: Cross multiply
    666,451.56x = 918,746.46 × 475,132.80
  4. Step 4: Simplify right side
    666,451.56x = 436,526,578,029.89
  5. Step 5: Solve for x
    x = 436,526,578,029.89/666,451.56
  6. Step 6: Final answer
    x = 655,001.21

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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.