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Finding the Fourth Proportional to 1,459.66, 2,186.76 and 728.38

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Solution

The fourth proportional to 1,459.66, 2,186.76 and 728.38 is: 1,091.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.66 : 2,186.76 = 728.38 : x
  2. Step 2: Convert to fraction form
    1,459.66/2,186.76 = 728.38/x
  3. Step 3: Cross multiply
    1,459.66x = 2,186.76 × 728.38
  4. Step 4: Simplify right side
    1,459.66x = 1,592,792.25
  5. Step 5: Solve for x
    x = 1,592,792.25/1,459.66
  6. Step 6: Final answer
    x = 1,091.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.