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Finding the Fourth Proportional to 398,357.64, 549,726.46 and 217,070.84

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Solution

The fourth proportional to 398,357.64, 549,726.46 and 217,070.84 is: 299,553.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,357.64 : 549,726.46 = 217,070.84 : x
  2. Step 2: Convert to fraction form
    398,357.64/549,726.46 = 217,070.84/x
  3. Step 3: Cross multiply
    398,357.64x = 549,726.46 × 217,070.84
  4. Step 4: Simplify right side
    398,357.64x = 119,329,584,442.43
  5. Step 5: Solve for x
    x = 119,329,584,442.43/398,357.64
  6. Step 6: Final answer
    x = 299,553.90

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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.