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Finding the Fourth Proportional to 1,049.60, 1,574.44 and 400.40

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Solution

The fourth proportional to 1,049.60, 1,574.44 and 400.40 is: 600.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.60 : 1,574.44 = 400.40 : x
  2. Step 2: Convert to fraction form
    1,049.60/1,574.44 = 400.40/x
  3. Step 3: Cross multiply
    1,049.60x = 1,574.44 × 400.40
  4. Step 4: Simplify right side
    1,049.60x = 630,405.78
  5. Step 5: Solve for x
    x = 630,405.78/1,049.60
  6. Step 6: Final answer
    x = 600.62

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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.