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Finding the Fourth Proportional to 1,264.84, 1,745.20 and 740.63

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Solution

The fourth proportional to 1,264.84, 1,745.20 and 740.63 is: 1,021.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.84 : 1,745.20 = 740.63 : x
  2. Step 2: Convert to fraction form
    1,264.84/1,745.20 = 740.63/x
  3. Step 3: Cross multiply
    1,264.84x = 1,745.20 × 740.63
  4. Step 4: Simplify right side
    1,264.84x = 1,292,547.48
  5. Step 5: Solve for x
    x = 1,292,547.48/1,264.84
  6. Step 6: Final answer
    x = 1,021.91

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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.