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Finding the Fourth Proportional to 398,465.30, 549,882.54 and 217,177.38

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Solution

The fourth proportional to 398,465.30, 549,882.54 and 217,177.38 is: 299,705.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,465.30 : 549,882.54 = 217,177.38 : x
  2. Step 2: Convert to fraction form
    398,465.30/549,882.54 = 217,177.38/x
  3. Step 3: Cross multiply
    398,465.30x = 549,882.54 × 217,177.38
  4. Step 4: Simplify right side
    398,465.30x = 119,422,049,344.95
  5. Step 5: Solve for x
    x = 119,422,049,344.95/398,465.30
  6. Step 6: Final answer
    x = 299,705.01

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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.