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Finding the Fourth Proportional to 1,292.49, 1,783.64 and 703.04

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Solution

The fourth proportional to 1,292.49, 1,783.64 and 703.04 is: 970.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.49 : 1,783.64 = 703.04 : x
  2. Step 2: Convert to fraction form
    1,292.49/1,783.64 = 703.04/x
  3. Step 3: Cross multiply
    1,292.49x = 1,783.64 × 703.04
  4. Step 4: Simplify right side
    1,292.49x = 1,253,963.10
  5. Step 5: Solve for x
    x = 1,253,963.10/1,292.49
  6. Step 6: Final answer
    x = 970.19

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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.