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Finding the Fourth Proportional to 398,417.83, 549,800.55 and 217,125.88

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Solution

The fourth proportional to 398,417.83, 549,800.55 and 217,125.88 is: 299,624.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,417.83 : 549,800.55 = 217,125.88 : x
  2. Step 2: Convert to fraction form
    398,417.83/549,800.55 = 217,125.88/x
  3. Step 3: Cross multiply
    398,417.83x = 549,800.55 × 217,125.88
  4. Step 4: Simplify right side
    398,417.83x = 119,375,928,243.23
  5. Step 5: Solve for x
    x = 119,375,928,243.23/398,417.83
  6. Step 6: Final answer
    x = 299,624.96

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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.