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Finding the Fourth Proportional to 485,351.38, 669,785.43 and 270,486.58

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Solution

The fourth proportional to 485,351.38, 669,785.43 and 270,486.58 is: 373,271.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,351.38 : 669,785.43 = 270,486.58 : x
  2. Step 2: Convert to fraction form
    485,351.38/669,785.43 = 270,486.58/x
  3. Step 3: Cross multiply
    485,351.38x = 669,785.43 × 270,486.58
  4. Step 4: Simplify right side
    485,351.38x = 181,167,970,294.53
  5. Step 5: Solve for x
    x = 181,167,970,294.53/485,351.38
  6. Step 6: Final answer
    x = 373,271.77

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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.