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Finding the Fourth Proportional to 398,251.51, 549,580.66 and 216,965.61

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Solution

The fourth proportional to 398,251.51, 549,580.66 and 216,965.61 is: 299,409.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,251.51 : 549,580.66 = 216,965.61 : x
  2. Step 2: Convert to fraction form
    398,251.51/549,580.66 = 216,965.61/x
  3. Step 3: Cross multiply
    398,251.51x = 549,580.66 × 216,965.61
  4. Step 4: Simplify right side
    398,251.51x = 119,240,103,141.10
  5. Step 5: Solve for x
    x = 119,240,103,141.10/398,251.51
  6. Step 6: Final answer
    x = 299,409.04

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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.