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Finding the Fourth Proportional to 1,292.67, 1,783.93 and 703.23

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Solution

The fourth proportional to 1,292.67, 1,783.93 and 703.23 is: 970.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.67 : 1,783.93 = 703.23 : x
  2. Step 2: Convert to fraction form
    1,292.67/1,783.93 = 703.23/x
  3. Step 3: Cross multiply
    1,292.67x = 1,783.93 × 703.23
  4. Step 4: Simplify right side
    1,292.67x = 1,254,514.85
  5. Step 5: Solve for x
    x = 1,254,514.85/1,292.67
  6. Step 6: Final answer
    x = 970.48

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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.