Home / 1,118.48-1,543.37-621.14

Finding the Fourth Proportional to 1,118.48, 1,543.37 and 621.14

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Solution

The fourth proportional to 1,118.48, 1,543.37 and 621.14 is: 857.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.48 : 1,543.37 = 621.14 : x
  2. Step 2: Convert to fraction form
    1,118.48/1,543.37 = 621.14/x
  3. Step 3: Cross multiply
    1,118.48x = 1,543.37 × 621.14
  4. Step 4: Simplify right side
    1,118.48x = 958,638.02
  5. Step 5: Solve for x
    x = 958,638.02/1,118.48
  6. Step 6: Final answer
    x = 857.09

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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.