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Finding the Fourth Proportional to 398,357.12, 549,734.88 and 217,071.04

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Solution

The fourth proportional to 398,357.12, 549,734.88 and 217,071.04 is: 299,559.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,357.12 : 549,734.88 = 217,071.04 : x
  2. Step 2: Convert to fraction form
    398,357.12/549,734.88 = 217,071.04/x
  3. Step 3: Cross multiply
    398,357.12x = 549,734.88 × 217,071.04
  4. Step 4: Simplify right side
    398,357.12x = 119,331,522,125.88
  5. Step 5: Solve for x
    x = 119,331,522,125.88/398,357.12
  6. Step 6: Final answer
    x = 299,559.15

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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.