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Finding the Fourth Proportional to 768.72, 1,060.80 and 437.22

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Solution

The fourth proportional to 768.72, 1,060.80 and 437.22 is: 603.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.72 : 1,060.80 = 437.22 : x
  2. Step 2: Convert to fraction form
    768.72/1,060.80 = 437.22/x
  3. Step 3: Cross multiply
    768.72x = 1,060.80 × 437.22
  4. Step 4: Simplify right side
    768.72x = 463,802.98
  5. Step 5: Solve for x
    x = 463,802.98/768.72
  6. Step 6: Final answer
    x = 603.34

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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.