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Finding the Fourth Proportional to 398,418.22, 549,801.10 and 217,126.26

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Solution

The fourth proportional to 398,418.22, 549,801.10 and 217,126.26 is: 299,625.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,418.22 : 549,801.10 = 217,126.26 : x
  2. Step 2: Convert to fraction form
    398,418.22/549,801.10 = 217,126.26/x
  3. Step 3: Cross multiply
    398,418.22x = 549,801.10 × 217,126.26
  4. Step 4: Simplify right side
    398,418.22x = 119,376,256,586.89
  5. Step 5: Solve for x
    x = 119,376,256,586.89/398,418.22
  6. Step 6: Final answer
    x = 299,625.50

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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.