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Finding the Fourth Proportional to 5,339.78, 7,368.90 and 2,981.92

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Solution

The fourth proportional to 5,339.78, 7,368.90 and 2,981.92 is: 4,115.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,339.78 : 7,368.90 = 2,981.92 : x
  2. Step 2: Convert to fraction form
    5,339.78/7,368.90 = 2,981.92/x
  3. Step 3: Cross multiply
    5,339.78x = 7,368.90 × 2,981.92
  4. Step 4: Simplify right side
    5,339.78x = 21,973,483.61
  5. Step 5: Solve for x
    x = 21,973,483.61/5,339.78
  6. Step 6: Final answer
    x = 4,115.05

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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.