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Finding the Fourth Proportional to 1,393.80, 2,089.48 and 527.55

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Solution

The fourth proportional to 1,393.80, 2,089.48 and 527.55 is: 790.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.80 : 2,089.48 = 527.55 : x
  2. Step 2: Convert to fraction form
    1,393.80/2,089.48 = 527.55/x
  3. Step 3: Cross multiply
    1,393.80x = 2,089.48 × 527.55
  4. Step 4: Simplify right side
    1,393.80x = 1,102,292.09
  5. Step 5: Solve for x
    x = 1,102,292.09/1,393.80
  6. Step 6: Final answer
    x = 790.86

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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.