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Finding the Fourth Proportional to 398,641.78, 550,129.98 and 217,352.26

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Solution

The fourth proportional to 398,641.78, 550,129.98 and 217,352.26 is: 299,948.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,641.78 : 550,129.98 = 217,352.26 : x
  2. Step 2: Convert to fraction form
    398,641.78/550,129.98 = 217,352.26/x
  3. Step 3: Cross multiply
    398,641.78x = 550,129.98 × 217,352.26
  4. Step 4: Simplify right side
    398,641.78x = 119,571,994,446.76
  5. Step 5: Solve for x
    x = 119,571,994,446.76/398,641.78
  6. Step 6: Final answer
    x = 299,948.48

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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.