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Finding the Fourth Proportional to 1,065.80, 1,598.22 and 416.20

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Solution

The fourth proportional to 1,065.80, 1,598.22 and 416.20 is: 624.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.80 : 1,598.22 = 416.20 : x
  2. Step 2: Convert to fraction form
    1,065.80/1,598.22 = 416.20/x
  3. Step 3: Cross multiply
    1,065.80x = 1,598.22 × 416.20
  4. Step 4: Simplify right side
    1,065.80x = 665,179.16
  5. Step 5: Solve for x
    x = 665,179.16/1,065.80
  6. Step 6: Final answer
    x = 624.11

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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.