Home / 1,330.98-1,987.52-1,158.09

Finding the Fourth Proportional to 1,330.98, 1,987.52 and 1,158.09

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Solution

The fourth proportional to 1,330.98, 1,987.52 and 1,158.09 is: 1,729.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.98 : 1,987.52 = 1,158.09 : x
  2. Step 2: Convert to fraction form
    1,330.98/1,987.52 = 1,158.09/x
  3. Step 3: Cross multiply
    1,330.98x = 1,987.52 × 1,158.09
  4. Step 4: Simplify right side
    1,330.98x = 2,301,727.04
  5. Step 5: Solve for x
    x = 2,301,727.04/1,330.98
  6. Step 6: Final answer
    x = 1,729.35

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,331.98, 1,989.01 and 1,159.09
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.