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Finding the Fourth Proportional to 398,479, 549,897.46 and 217,190.92

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Solution

The fourth proportional to 398,479, 549,897.46 and 217,190.92 is: 299,721.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,479 : 549,897.46 = 217,190.92 : x
  2. Step 2: Convert to fraction form
    398,479/549,897.46 = 217,190.92/x
  3. Step 3: Cross multiply
    398,479x = 549,897.46 × 217,190.92
  4. Step 4: Simplify right side
    398,479x = 119,432,735,243.06
  5. Step 5: Solve for x
    x = 119,432,735,243.06/398,479
  6. Step 6: Final answer
    x = 299,721.53

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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.