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Finding the Fourth Proportional to 568.77, 784.81 and 358.58

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Solution

The fourth proportional to 568.77, 784.81 and 358.58 is: 494.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.77 : 784.81 = 358.58 : x
  2. Step 2: Convert to fraction form
    568.77/784.81 = 358.58/x
  3. Step 3: Cross multiply
    568.77x = 784.81 × 358.58
  4. Step 4: Simplify right side
    568.77x = 281,417.17
  5. Step 5: Solve for x
    x = 281,417.17/568.77
  6. Step 6: Final answer
    x = 494.78

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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.