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Finding the Fourth Proportional to 768.81, 1,060.98 and 437.25

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Solution

The fourth proportional to 768.81, 1,060.98 and 437.25 is: 603.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.81 : 1,060.98 = 437.25 : x
  2. Step 2: Convert to fraction form
    768.81/1,060.98 = 437.25/x
  3. Step 3: Cross multiply
    768.81x = 1,060.98 × 437.25
  4. Step 4: Simplify right side
    768.81x = 463,913.51
  5. Step 5: Solve for x
    x = 463,913.51/768.81
  6. Step 6: Final answer
    x = 603.42

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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.