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Finding the Fourth Proportional to 4,988.86, 7,484.30 and 1,868.79

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Solution

The fourth proportional to 4,988.86, 7,484.30 and 1,868.79 is: 2,803.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,988.86 : 7,484.30 = 1,868.79 : x
  2. Step 2: Convert to fraction form
    4,988.86/7,484.30 = 1,868.79/x
  3. Step 3: Cross multiply
    4,988.86x = 7,484.30 × 1,868.79
  4. Step 4: Simplify right side
    4,988.86x = 13,986,568.63
  5. Step 5: Solve for x
    x = 13,986,568.63/4,988.86
  6. Step 6: Final answer
    x = 2,803.56

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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.