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Finding the Fourth Proportional to 1,347.46, 2,020.80 and 525.55

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Solution

The fourth proportional to 1,347.46, 2,020.80 and 525.55 is: 788.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.46 : 2,020.80 = 525.55 : x
  2. Step 2: Convert to fraction form
    1,347.46/2,020.80 = 525.55/x
  3. Step 3: Cross multiply
    1,347.46x = 2,020.80 × 525.55
  4. Step 4: Simplify right side
    1,347.46x = 1,062,031.44
  5. Step 5: Solve for x
    x = 1,062,031.44/1,347.46
  6. Step 6: Final answer
    x = 788.17

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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.