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Finding the Fourth Proportional to 398,378.54, 549,755.57 and 217,092.04

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Solution

The fourth proportional to 398,378.54, 549,755.57 and 217,092.04 is: 299,583.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,378.54 : 549,755.57 = 217,092.04 : x
  2. Step 2: Convert to fraction form
    398,378.54/549,755.57 = 217,092.04/x
  3. Step 3: Cross multiply
    398,378.54x = 549,755.57 × 217,092.04
  4. Step 4: Simplify right side
    398,378.54x = 119,347,557,361.00
  5. Step 5: Solve for x
    x = 119,347,557,361.00/398,378.54
  6. Step 6: Final answer
    x = 299,583.30

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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.