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Finding the Fourth Proportional to 543,904.20, 815,078.70 and 400,631.40

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Solution

The fourth proportional to 543,904.20, 815,078.70 and 400,631.40 is: 600,374.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,904.20 : 815,078.70 = 400,631.40 : x
  2. Step 2: Convert to fraction form
    543,904.20/815,078.70 = 400,631.40/x
  3. Step 3: Cross multiply
    543,904.20x = 815,078.70 × 400,631.40
  4. Step 4: Simplify right side
    543,904.20x = 326,546,120,691.18
  5. Step 5: Solve for x
    x = 326,546,120,691.18/543,904.20
  6. Step 6: Final answer
    x = 600,374.33

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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.