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Finding the Fourth Proportional to 398,397.22, 549,772.16 and 217,105.28

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Solution

The fourth proportional to 398,397.22, 549,772.16 and 217,105.28 is: 299,596.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,397.22 : 549,772.16 = 217,105.28 : x
  2. Step 2: Convert to fraction form
    398,397.22/549,772.16 = 217,105.28/x
  3. Step 3: Cross multiply
    398,397.22x = 549,772.16 × 217,105.28
  4. Step 4: Simplify right side
    398,397.22x = 119,358,440,650.20
  5. Step 5: Solve for x
    x = 119,358,440,650.20/398,397.22
  6. Step 6: Final answer
    x = 299,596.57

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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.