Home / 1,155.20-1,731.51-539.06

Finding the Fourth Proportional to 1,155.20, 1,731.51 and 539.06

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Solution

The fourth proportional to 1,155.20, 1,731.51 and 539.06 is: 807.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.20 : 1,731.51 = 539.06 : x
  2. Step 2: Convert to fraction form
    1,155.20/1,731.51 = 539.06/x
  3. Step 3: Cross multiply
    1,155.20x = 1,731.51 × 539.06
  4. Step 4: Simplify right side
    1,155.20x = 933,379.12
  5. Step 5: Solve for x
    x = 933,379.12/1,155.20
  6. Step 6: Final answer
    x = 807.98

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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.