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Finding the Fourth Proportional to 661,992.10, 991,967.55 and 492,718.30

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Solution

The fourth proportional to 661,992.10, 991,967.55 and 492,718.30 is: 738,317.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,992.10 : 991,967.55 = 492,718.30 : x
  2. Step 2: Convert to fraction form
    661,992.10/991,967.55 = 492,718.30/x
  3. Step 3: Cross multiply
    661,992.10x = 991,967.55 × 492,718.30
  4. Step 4: Simplify right side
    661,992.10x = 488,760,564,891.17
  5. Step 5: Solve for x
    x = 488,760,564,891.17/661,992.10
  6. Step 6: Final answer
    x = 738,317.82

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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.