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Finding the Fourth Proportional to 1,292.05, 1,783.02 and 702.59

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Solution

The fourth proportional to 1,292.05, 1,783.02 and 702.59 is: 969.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.05 : 1,783.02 = 702.59 : x
  2. Step 2: Convert to fraction form
    1,292.05/1,783.02 = 702.59/x
  3. Step 3: Cross multiply
    1,292.05x = 1,783.02 × 702.59
  4. Step 4: Simplify right side
    1,292.05x = 1,252,725.74
  5. Step 5: Solve for x
    x = 1,252,725.74/1,292.05
  6. Step 6: Final answer
    x = 969.56

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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.