Home / 1,631.20-2,445.36-1,055.20

Finding the Fourth Proportional to 1,631.20, 2,445.36 and 1,055.20

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Solution

The fourth proportional to 1,631.20, 2,445.36 and 1,055.20 is: 1,581.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.20 : 2,445.36 = 1,055.20 : x
  2. Step 2: Convert to fraction form
    1,631.20/2,445.36 = 1,055.20/x
  3. Step 3: Cross multiply
    1,631.20x = 2,445.36 × 1,055.20
  4. Step 4: Simplify right side
    1,631.20x = 2,580,343.87
  5. Step 5: Solve for x
    x = 2,580,343.87/1,631.20
  6. Step 6: Final answer
    x = 1,581.87

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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.