Home / 1,587.23-2,379.59-720.53

Finding the Fourth Proportional to 1,587.23, 2,379.59 and 720.53

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Solution

The fourth proportional to 1,587.23, 2,379.59 and 720.53 is: 1,080.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.23 : 2,379.59 = 720.53 : x
  2. Step 2: Convert to fraction form
    1,587.23/2,379.59 = 720.53/x
  3. Step 3: Cross multiply
    1,587.23x = 2,379.59 × 720.53
  4. Step 4: Simplify right side
    1,587.23x = 1,714,562.38
  5. Step 5: Solve for x
    x = 1,714,562.38/1,587.23
  6. Step 6: Final answer
    x = 1,080.22

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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.