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Finding the Fourth Proportional to 5,308.98, 7,929.52 and 4,807.90

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Solution

The fourth proportional to 5,308.98, 7,929.52 and 4,807.90 is: 7,181.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,308.98 : 7,929.52 = 4,807.90 : x
  2. Step 2: Convert to fraction form
    5,308.98/7,929.52 = 4,807.90/x
  3. Step 3: Cross multiply
    5,308.98x = 7,929.52 × 4,807.90
  4. Step 4: Simplify right side
    5,308.98x = 38,124,342.95
  5. Step 5: Solve for x
    x = 38,124,342.95/5,308.98
  6. Step 6: Final answer
    x = 7,181.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.