Home / 1,242.72-1,710.36-1,153.26

Finding the Fourth Proportional to 1,242.72, 1,710.36 and 1,153.26

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Solution

The fourth proportional to 1,242.72, 1,710.36 and 1,153.26 is: 1,587.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.72 : 1,710.36 = 1,153.26 : x
  2. Step 2: Convert to fraction form
    1,242.72/1,710.36 = 1,153.26/x
  3. Step 3: Cross multiply
    1,242.72x = 1,710.36 × 1,153.26
  4. Step 4: Simplify right side
    1,242.72x = 1,972,489.77
  5. Step 5: Solve for x
    x = 1,972,489.77/1,242.72
  6. Step 6: Final answer
    x = 1,587.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.