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Finding the Fourth Proportional to 768.99, 1,061.30 and 437.51

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Solution

The fourth proportional to 768.99, 1,061.30 and 437.51 is: 603.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.99 : 1,061.30 = 437.51 : x
  2. Step 2: Convert to fraction form
    768.99/1,061.30 = 437.51/x
  3. Step 3: Cross multiply
    768.99x = 1,061.30 × 437.51
  4. Step 4: Simplify right side
    768.99x = 464,329.36
  5. Step 5: Solve for x
    x = 464,329.36/768.99
  6. Step 6: Final answer
    x = 603.82

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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.