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Finding the Fourth Proportional to 768.04, 1,053.51 and 761.45

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Solution

The fourth proportional to 768.04, 1,053.51 and 761.45 is: 1,044.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.04 : 1,053.51 = 761.45 : x
  2. Step 2: Convert to fraction form
    768.04/1,053.51 = 761.45/x
  3. Step 3: Cross multiply
    768.04x = 1,053.51 × 761.45
  4. Step 4: Simplify right side
    768.04x = 802,195.19
  5. Step 5: Solve for x
    x = 802,195.19/768.04
  6. Step 6: Final answer
    x = 1,044.47

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.