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Finding the Fourth Proportional to 763.47, 1,054.45 and 514.36

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Solution

The fourth proportional to 763.47, 1,054.45 and 514.36 is: 710.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.47 : 1,054.45 = 514.36 : x
  2. Step 2: Convert to fraction form
    763.47/1,054.45 = 514.36/x
  3. Step 3: Cross multiply
    763.47x = 1,054.45 × 514.36
  4. Step 4: Simplify right side
    763.47x = 542,361.63
  5. Step 5: Solve for x
    x = 542,361.63/763.47
  6. Step 6: Final answer
    x = 710.39

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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.