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Finding the Fourth Proportional to 485,225.39, 669,613.70 and 281,397.17

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Solution

The fourth proportional to 485,225.39, 669,613.70 and 281,397.17 is: 388,329.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,225.39 : 669,613.70 = 281,397.17 : x
  2. Step 2: Convert to fraction form
    485,225.39/669,613.70 = 281,397.17/x
  3. Step 3: Cross multiply
    485,225.39x = 669,613.70 × 281,397.17
  4. Step 4: Simplify right side
    485,225.39x = 188,427,395,418.18
  5. Step 5: Solve for x
    x = 188,427,395,418.18/485,225.39
  6. Step 6: Final answer
    x = 388,329.63

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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.