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Finding the Fourth Proportional to 398,139.54, 549,429.72 and 216,850.92

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Solution

The fourth proportional to 398,139.54, 549,429.72 and 216,850.92 is: 299,252.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,139.54 : 549,429.72 = 216,850.92 : x
  2. Step 2: Convert to fraction form
    398,139.54/549,429.72 = 216,850.92/x
  3. Step 3: Cross multiply
    398,139.54x = 549,429.72 × 216,850.92
  4. Step 4: Simplify right side
    398,139.54x = 119,144,340,257.34
  5. Step 5: Solve for x
    x = 119,144,340,257.34/398,139.54
  6. Step 6: Final answer
    x = 299,252.72

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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.