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Finding the Fourth Proportional to 721,861.40, 996,080.64 and 416,036.72

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Solution

The fourth proportional to 721,861.40, 996,080.64 and 416,036.72 is: 574,079.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,861.40 : 996,080.64 = 416,036.72 : x
  2. Step 2: Convert to fraction form
    721,861.40/996,080.64 = 416,036.72/x
  3. Step 3: Cross multiply
    721,861.40x = 996,080.64 × 416,036.72
  4. Step 4: Simplify right side
    721,861.40x = 414,406,122,321.10
  5. Step 5: Solve for x
    x = 414,406,122,321.10/721,861.40
  6. Step 6: Final answer
    x = 574,079.90

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1.5x scale

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.