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Finding the Fourth Proportional to 660,301.78, 991,018.23 and 655,331.62

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Solution

The fourth proportional to 660,301.78, 991,018.23 and 655,331.62 is: 983,558.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,301.78 : 991,018.23 = 655,331.62 : x
  2. Step 2: Convert to fraction form
    660,301.78/991,018.23 = 655,331.62/x
  3. Step 3: Cross multiply
    660,301.78x = 991,018.23 × 655,331.62
  4. Step 4: Simplify right side
    660,301.78x = 649,445,582,115.43
  5. Step 5: Solve for x
    x = 649,445,582,115.43/660,301.78
  6. Step 6: Final answer
    x = 983,558.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.