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Finding the Fourth Proportional to 929.62, 1,282.66 and 556.53

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Solution

The fourth proportional to 929.62, 1,282.66 and 556.53 is: 767.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.62 : 1,282.66 = 556.53 : x
  2. Step 2: Convert to fraction form
    929.62/1,282.66 = 556.53/x
  3. Step 3: Cross multiply
    929.62x = 1,282.66 × 556.53
  4. Step 4: Simplify right side
    929.62x = 713,838.77
  5. Step 5: Solve for x
    x = 713,838.77/929.62
  6. Step 6: Final answer
    x = 767.88

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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.