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Finding the Fourth Proportional to 2,868.64, 4,302.40 and 788.11

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Solution

The fourth proportional to 2,868.64, 4,302.40 and 788.11 is: 1,182.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.64 : 4,302.40 = 788.11 : x
  2. Step 2: Convert to fraction form
    2,868.64/4,302.40 = 788.11/x
  3. Step 3: Cross multiply
    2,868.64x = 4,302.40 × 788.11
  4. Step 4: Simplify right side
    2,868.64x = 3,390,770.83
  5. Step 5: Solve for x
    x = 3,390,770.83/2,868.64
  6. Step 6: Final answer
    x = 1,182.01

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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.