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Finding the Fourth Proportional to 4,908.30, 7,357.65 and 4,389.90

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Solution

The fourth proportional to 4,908.30, 7,357.65 and 4,389.90 is: 6,580.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,908.30 : 7,357.65 = 4,389.90 : x
  2. Step 2: Convert to fraction form
    4,908.30/7,357.65 = 4,389.90/x
  3. Step 3: Cross multiply
    4,908.30x = 7,357.65 × 4,389.90
  4. Step 4: Simplify right side
    4,908.30x = 32,299,347.74
  5. Step 5: Solve for x
    x = 32,299,347.74/4,908.30
  6. Step 6: Final answer
    x = 6,580.56

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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.