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Finding the Fourth Proportional to 1,458.85, 2,186.45 and 728.63

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Solution

The fourth proportional to 1,458.85, 2,186.45 and 728.63 is: 1,092.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.85 : 2,186.45 = 728.63 : x
  2. Step 2: Convert to fraction form
    1,458.85/2,186.45 = 728.63/x
  3. Step 3: Cross multiply
    1,458.85x = 2,186.45 × 728.63
  4. Step 4: Simplify right side
    1,458.85x = 1,593,113.06
  5. Step 5: Solve for x
    x = 1,593,113.06/1,458.85
  6. Step 6: Final answer
    x = 1,092.03

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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.