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Finding the Fourth Proportional to 1,292.89, 1,784.20 and 703.42

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Solution

The fourth proportional to 1,292.89, 1,784.20 and 703.42 is: 970.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.89 : 1,784.20 = 703.42 : x
  2. Step 2: Convert to fraction form
    1,292.89/1,784.20 = 703.42/x
  3. Step 3: Cross multiply
    1,292.89x = 1,784.20 × 703.42
  4. Step 4: Simplify right side
    1,292.89x = 1,255,041.96
  5. Step 5: Solve for x
    x = 1,255,041.96/1,292.89
  6. Step 6: Final answer
    x = 970.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.