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Finding the Fourth Proportional to 398,424.22, 549,809.37 and 217,132.30

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Solution

The fourth proportional to 398,424.22, 549,809.37 and 217,132.30 is: 299,633.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,424.22 : 549,809.37 = 217,132.30 : x
  2. Step 2: Convert to fraction form
    398,424.22/549,809.37 = 217,132.30/x
  3. Step 3: Cross multiply
    398,424.22x = 549,809.37 × 217,132.30
  4. Step 4: Simplify right side
    398,424.22x = 119,381,373,069.65
  5. Step 5: Solve for x
    x = 119,381,373,069.65/398,424.22
  6. Step 6: Final answer
    x = 299,633.83

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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.