Home / 1,037.10-1,555.14-420.28

Finding the Fourth Proportional to 1,037.10, 1,555.14 and 420.28

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Solution

The fourth proportional to 1,037.10, 1,555.14 and 420.28 is: 630.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.10 : 1,555.14 = 420.28 : x
  2. Step 2: Convert to fraction form
    1,037.10/1,555.14 = 420.28/x
  3. Step 3: Cross multiply
    1,037.10x = 1,555.14 × 420.28
  4. Step 4: Simplify right side
    1,037.10x = 653,594.24
  5. Step 5: Solve for x
    x = 653,594.24/1,037.10
  6. Step 6: Final answer
    x = 630.21

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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.