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Finding the Fourth Proportional to 398,479.74, 549,897.20 and 217,191.10

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Solution

The fourth proportional to 398,479.74, 549,897.20 and 217,191.10 is: 299,721.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,479.74 : 549,897.20 = 217,191.10 : x
  2. Step 2: Convert to fraction form
    398,479.74/549,897.20 = 217,191.10/x
  3. Step 3: Cross multiply
    398,479.74x = 549,897.20 × 217,191.10
  4. Step 4: Simplify right side
    398,479.74x = 119,432,777,754.92
  5. Step 5: Solve for x
    x = 119,432,777,754.92/398,479.74
  6. Step 6: Final answer
    x = 299,721.08

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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.