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Finding the Fourth Proportional to 598.12, 891.30 and 578.54

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Solution

The fourth proportional to 598.12, 891.30 and 578.54 is: 862.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    598.12 : 891.30 = 578.54 : x
  2. Step 2: Convert to fraction form
    598.12/891.30 = 578.54/x
  3. Step 3: Cross multiply
    598.12x = 891.30 × 578.54
  4. Step 4: Simplify right side
    598.12x = 515,657.10
  5. Step 5: Solve for x
    x = 515,657.10/598.12
  6. Step 6: Final answer
    x = 862.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.