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Finding the Fourth Proportional to 568.76, 784.15 and 372.20

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Solution

The fourth proportional to 568.76, 784.15 and 372.20 is: 513.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.76 : 784.15 = 372.20 : x
  2. Step 2: Convert to fraction form
    568.76/784.15 = 372.20/x
  3. Step 3: Cross multiply
    568.76x = 784.15 × 372.20
  4. Step 4: Simplify right side
    568.76x = 291,855.78
  5. Step 5: Solve for x
    x = 291,855.78/568.76
  6. Step 6: Final answer
    x = 513.15

Related Problems

Find fourth proportional to 284.38, 392.07 and 186.10
Half scale
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Double scale
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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.