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Finding the Fourth Proportional to 2,686.79, 4,030.04 and 738.98

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Solution

The fourth proportional to 2,686.79, 4,030.04 and 738.98 is: 1,108.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.79 : 4,030.04 = 738.98 : x
  2. Step 2: Convert to fraction form
    2,686.79/4,030.04 = 738.98/x
  3. Step 3: Cross multiply
    2,686.79x = 4,030.04 × 738.98
  4. Step 4: Simplify right side
    2,686.79x = 2,978,095.11
  5. Step 5: Solve for x
    x = 2,978,095.11/2,686.79
  6. Step 6: Final answer
    x = 1,108.42

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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.