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Finding the Fourth Proportional to 398,377.74, 549,761.31 and 217,089.62

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Solution

The fourth proportional to 398,377.74, 549,761.31 and 217,089.62 is: 299,583.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,377.74 : 549,761.31 = 217,089.62 : x
  2. Step 2: Convert to fraction form
    398,377.74/549,761.31 = 217,089.62/x
  3. Step 3: Cross multiply
    398,377.74x = 549,761.31 × 217,089.62
  4. Step 4: Simplify right side
    398,377.74x = 119,347,473,191.40
  5. Step 5: Solve for x
    x = 119,347,473,191.40/398,377.74
  6. Step 6: Final answer
    x = 299,583.69

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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.