Home / 1,175.02-1,621.11-709.18

Finding the Fourth Proportional to 1,175.02, 1,621.11 and 709.18

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Solution

The fourth proportional to 1,175.02, 1,621.11 and 709.18 is: 978.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,175.02 : 1,621.11 = 709.18 : x
  2. Step 2: Convert to fraction form
    1,175.02/1,621.11 = 709.18/x
  3. Step 3: Cross multiply
    1,175.02x = 1,621.11 × 709.18
  4. Step 4: Simplify right side
    1,175.02x = 1,149,658.79
  5. Step 5: Solve for x
    x = 1,149,658.79/1,175.02
  6. Step 6: Final answer
    x = 978.42

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1.5x scale

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.