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Finding the Fourth Proportional to 782.58, 1,079.52 and 558.57

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Solution

The fourth proportional to 782.58, 1,079.52 and 558.57 is: 770.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.58 : 1,079.52 = 558.57 : x
  2. Step 2: Convert to fraction form
    782.58/1,079.52 = 558.57/x
  3. Step 3: Cross multiply
    782.58x = 1,079.52 × 558.57
  4. Step 4: Simplify right side
    782.58x = 602,984.94
  5. Step 5: Solve for x
    x = 602,984.94/782.58
  6. Step 6: Final answer
    x = 770.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.