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Finding the Fourth Proportional to 1,292.93, 1,784.15 and 703.45

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Solution

The fourth proportional to 1,292.93, 1,784.15 and 703.45 is: 970.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.93 : 1,784.15 = 703.45 : x
  2. Step 2: Convert to fraction form
    1,292.93/1,784.15 = 703.45/x
  3. Step 3: Cross multiply
    1,292.93x = 1,784.15 × 703.45
  4. Step 4: Simplify right side
    1,292.93x = 1,255,052.34
  5. Step 5: Solve for x
    x = 1,255,052.34/1,292.93
  6. Step 6: Final answer
    x = 970.71

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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.