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Finding the Fourth Proportional to 568.47, 784.38 and 358.91

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Solution

The fourth proportional to 568.47, 784.38 and 358.91 is: 495.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.47 : 784.38 = 358.91 : x
  2. Step 2: Convert to fraction form
    568.47/784.38 = 358.91/x
  3. Step 3: Cross multiply
    568.47x = 784.38 × 358.91
  4. Step 4: Simplify right side
    568.47x = 281,519.99
  5. Step 5: Solve for x
    x = 281,519.99/568.47
  6. Step 6: Final answer
    x = 495.23

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1.5x scale

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.