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Finding the Fourth Proportional to 569.46, 784.69 and 507.20

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Solution

The fourth proportional to 569.46, 784.69 and 507.20 is: 698.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.46 : 784.69 = 507.20 : x
  2. Step 2: Convert to fraction form
    569.46/784.69 = 507.20/x
  3. Step 3: Cross multiply
    569.46x = 784.69 × 507.20
  4. Step 4: Simplify right side
    569.46x = 397,989.58
  5. Step 5: Solve for x
    x = 397,989.58/569.46
  6. Step 6: Final answer
    x = 698.88

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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.