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Finding the Fourth Proportional to 1,293, 1,938.72 and 877.04

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Solution

The fourth proportional to 1,293, 1,938.72 and 877.04 is: 1,315.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293 : 1,938.72 = 877.04 : x
  2. Step 2: Convert to fraction form
    1,293/1,938.72 = 877.04/x
  3. Step 3: Cross multiply
    1,293x = 1,938.72 × 877.04
  4. Step 4: Simplify right side
    1,293x = 1,700,339.84
  5. Step 5: Solve for x
    x = 1,700,339.84/1,293
  6. Step 6: Final answer
    x = 1,315.03

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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.