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Finding the Fourth Proportional to 485,417.38, 669,864.57 and 281,504.74

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Solution

The fourth proportional to 485,417.38, 669,864.57 and 281,504.74 is: 388,469.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,417.38 : 669,864.57 = 281,504.74 : x
  2. Step 2: Convert to fraction form
    485,417.38/669,864.57 = 281,504.74/x
  3. Step 3: Cross multiply
    485,417.38x = 669,864.57 × 281,504.74
  4. Step 4: Simplify right side
    485,417.38x = 188,570,051,613.06
  5. Step 5: Solve for x
    x = 188,570,051,613.06/485,417.38
  6. Step 6: Final answer
    x = 388,469.92

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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.