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Finding the Fourth Proportional to 398,710.55, 550,233.84 and 217,432.40

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Solution

The fourth proportional to 398,710.55, 550,233.84 and 217,432.40 is: 300,063.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,710.55 : 550,233.84 = 217,432.40 : x
  2. Step 2: Convert to fraction form
    398,710.55/550,233.84 = 217,432.40/x
  3. Step 3: Cross multiply
    398,710.55x = 550,233.84 × 217,432.40
  4. Step 4: Simplify right side
    398,710.55x = 119,638,664,392.42
  5. Step 5: Solve for x
    x = 119,638,664,392.42/398,710.55
  6. Step 6: Final answer
    x = 300,063.95

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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.