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Finding the Fourth Proportional to 401,445.20, 602,167.80 and 398,680.40

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Solution

The fourth proportional to 401,445.20, 602,167.80 and 398,680.40 is: 598,020.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,445.20 : 602,167.80 = 398,680.40 : x
  2. Step 2: Convert to fraction form
    401,445.20/602,167.80 = 398,680.40/x
  3. Step 3: Cross multiply
    401,445.20x = 602,167.80 × 398,680.40
  4. Step 4: Simplify right side
    401,445.20x = 240,072,499,371.12
  5. Step 5: Solve for x
    x = 240,072,499,371.12/401,445.20
  6. Step 6: Final answer
    x = 598,020.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.