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Finding the Fourth Proportional to 4,988.81, 7,484.49 and 1,478.95

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Solution

The fourth proportional to 4,988.81, 7,484.49 and 1,478.95 is: 2,218.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,988.81 : 7,484.49 = 1,478.95 : x
  2. Step 2: Convert to fraction form
    4,988.81/7,484.49 = 1,478.95/x
  3. Step 3: Cross multiply
    4,988.81x = 7,484.49 × 1,478.95
  4. Step 4: Simplify right side
    4,988.81x = 11,069,167.77
  5. Step 5: Solve for x
    x = 11,069,167.77/4,988.81
  6. Step 6: Final answer
    x = 2,218.80

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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.