Home / 1,037.20-1,555.26-420.88

Finding the Fourth Proportional to 1,037.20, 1,555.26 and 420.88

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Solution

The fourth proportional to 1,037.20, 1,555.26 and 420.88 is: 631.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.20 : 1,555.26 = 420.88 : x
  2. Step 2: Convert to fraction form
    1,037.20/1,555.26 = 420.88/x
  3. Step 3: Cross multiply
    1,037.20x = 1,555.26 × 420.88
  4. Step 4: Simplify right side
    1,037.20x = 654,577.83
  5. Step 5: Solve for x
    x = 654,577.83/1,037.20
  6. Step 6: Final answer
    x = 631.10

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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.