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Finding the Fourth Proportional to 661,991.10, 991,966.05 and 492,717.30

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Solution

The fourth proportional to 661,991.10, 991,966.05 and 492,717.30 is: 738,316.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,991.10 : 991,966.05 = 492,717.30 : x
  2. Step 2: Convert to fraction form
    661,991.10/991,966.05 = 492,717.30/x
  3. Step 3: Cross multiply
    661,991.10x = 991,966.05 × 492,717.30
  4. Step 4: Simplify right side
    661,991.10x = 488,758,833,847.67
  5. Step 5: Solve for x
    x = 488,758,833,847.67/661,991.10
  6. Step 6: Final answer
    x = 738,316.32

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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.