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Finding the Fourth Proportional to 1,230.80, 1,845.12 and 653.12

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Solution

The fourth proportional to 1,230.80, 1,845.12 and 653.12 is: 979.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.80 : 1,845.12 = 653.12 : x
  2. Step 2: Convert to fraction form
    1,230.80/1,845.12 = 653.12/x
  3. Step 3: Cross multiply
    1,230.80x = 1,845.12 × 653.12
  4. Step 4: Simplify right side
    1,230.80x = 1,205,084.77
  5. Step 5: Solve for x
    x = 1,205,084.77/1,230.80
  6. Step 6: Final answer
    x = 979.11

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1.5x scale

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.