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Finding the Fourth Proportional to 400,043.20, 600,064.80 and 381,672.40

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Solution

The fourth proportional to 400,043.20, 600,064.80 and 381,672.40 is: 572,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,043.20 : 600,064.80 = 381,672.40 : x
  2. Step 2: Convert to fraction form
    400,043.20/600,064.80 = 381,672.40/x
  3. Step 3: Cross multiply
    400,043.20x = 600,064.80 × 381,672.40
  4. Step 4: Simplify right side
    400,043.20x = 229,028,172,371.52
  5. Step 5: Solve for x
    x = 229,028,172,371.52/400,043.20
  6. Step 6: Final answer
    x = 572,508.60

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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.