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Finding the Fourth Proportional to 398,318.60, 549,672.75 and 217,032.02

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Solution

The fourth proportional to 398,318.60, 549,672.75 and 217,032.02 is: 299,500.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,318.60 : 549,672.75 = 217,032.02 : x
  2. Step 2: Convert to fraction form
    398,318.60/549,672.75 = 217,032.02/x
  3. Step 3: Cross multiply
    398,318.60x = 549,672.75 × 217,032.02
  4. Step 4: Simplify right side
    398,318.60x = 119,296,587,271.46
  5. Step 5: Solve for x
    x = 119,296,587,271.46/398,318.60
  6. Step 6: Final answer
    x = 299,500.42

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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.