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Finding the Fourth Proportional to 4,931.60, 7,400.60 and 2,851.60

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Solution

The fourth proportional to 4,931.60, 7,400.60 and 2,851.60 is: 4,279.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,931.60 : 7,400.60 = 2,851.60 : x
  2. Step 2: Convert to fraction form
    4,931.60/7,400.60 = 2,851.60/x
  3. Step 3: Cross multiply
    4,931.60x = 7,400.60 × 2,851.60
  4. Step 4: Simplify right side
    4,931.60x = 21,103,550.96
  5. Step 5: Solve for x
    x = 21,103,550.96/4,931.60
  6. Step 6: Final answer
    x = 4,279.25

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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.