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Finding the Fourth Proportional to 3,152.47, 4,728.70 and 961.20

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Solution

The fourth proportional to 3,152.47, 4,728.70 and 961.20 is: 1,441.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,152.47 : 4,728.70 = 961.20 : x
  2. Step 2: Convert to fraction form
    3,152.47/4,728.70 = 961.20/x
  3. Step 3: Cross multiply
    3,152.47x = 4,728.70 × 961.20
  4. Step 4: Simplify right side
    3,152.47x = 4,545,220.37
  5. Step 5: Solve for x
    x = 4,545,220.37/3,152.47
  6. Step 6: Final answer
    x = 1,441.80

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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.