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Finding the Fourth Proportional to 5,648.78, 7,795.20 and 3,130.89

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Solution

The fourth proportional to 5,648.78, 7,795.20 and 3,130.89 is: 4,320.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,648.78 : 7,795.20 = 3,130.89 : x
  2. Step 2: Convert to fraction form
    5,648.78/7,795.20 = 3,130.89/x
  3. Step 3: Cross multiply
    5,648.78x = 7,795.20 × 3,130.89
  4. Step 4: Simplify right side
    5,648.78x = 24,405,913.73
  5. Step 5: Solve for x
    x = 24,405,913.73/5,648.78
  6. Step 6: Final answer
    x = 4,320.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.