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Finding the Fourth Proportional to 2,899.78, 4,353.32 and 1,930.20

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Solution

The fourth proportional to 2,899.78, 4,353.32 and 1,930.20 is: 2,897.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,899.78 : 4,353.32 = 1,930.20 : x
  2. Step 2: Convert to fraction form
    2,899.78/4,353.32 = 1,930.20/x
  3. Step 3: Cross multiply
    2,899.78x = 4,353.32 × 1,930.20
  4. Step 4: Simplify right side
    2,899.78x = 8,402,778.26
  5. Step 5: Solve for x
    x = 8,402,778.26/2,899.78
  6. Step 6: Final answer
    x = 2,897.73

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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.