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Finding the Fourth Proportional to 398,401.92, 550,331.28 and 370,058.40

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Solution

The fourth proportional to 398,401.92, 550,331.28 and 370,058.40 is: 511,179.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,401.92 : 550,331.28 = 370,058.40 : x
  2. Step 2: Convert to fraction form
    398,401.92/550,331.28 = 370,058.40/x
  3. Step 3: Cross multiply
    398,401.92x = 550,331.28 × 370,058.40
  4. Step 4: Simplify right side
    398,401.92x = 203,654,712,946.75
  5. Step 5: Solve for x
    x = 203,654,712,946.75/398,401.92
  6. Step 6: Final answer
    x = 511,179.04

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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.