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Finding the Fourth Proportional to 398,474.46, 549,891.26 and 217,186.40

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Solution

The fourth proportional to 398,474.46, 549,891.26 and 217,186.40 is: 299,715.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,474.46 : 549,891.26 = 217,186.40 : x
  2. Step 2: Convert to fraction form
    398,474.46/549,891.26 = 217,186.40/x
  3. Step 3: Cross multiply
    398,474.46x = 549,891.26 × 217,186.40
  4. Step 4: Simplify right side
    398,474.46x = 119,428,903,150.86
  5. Step 5: Solve for x
    x = 119,428,903,150.86/398,474.46
  6. Step 6: Final answer
    x = 299,715.33

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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.