Home / 1,118.35-1,543.57-621.16

Finding the Fourth Proportional to 1,118.35, 1,543.57 and 621.16

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Solution

The fourth proportional to 1,118.35, 1,543.57 and 621.16 is: 857.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.35 : 1,543.57 = 621.16 : x
  2. Step 2: Convert to fraction form
    1,118.35/1,543.57 = 621.16/x
  3. Step 3: Cross multiply
    1,118.35x = 1,543.57 × 621.16
  4. Step 4: Simplify right side
    1,118.35x = 958,803.94
  5. Step 5: Solve for x
    x = 958,803.94/1,118.35
  6. Step 6: Final answer
    x = 857.34

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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.