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Finding the Fourth Proportional to 1,264.19, 1,744.59 and 740.23

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Solution

The fourth proportional to 1,264.19, 1,744.59 and 740.23 is: 1,021.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.19 : 1,744.59 = 740.23 : x
  2. Step 2: Convert to fraction form
    1,264.19/1,744.59 = 740.23/x
  3. Step 3: Cross multiply
    1,264.19x = 1,744.59 × 740.23
  4. Step 4: Simplify right side
    1,264.19x = 1,291,397.86
  5. Step 5: Solve for x
    x = 1,291,397.86/1,264.19
  6. Step 6: Final answer
    x = 1,021.52

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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.