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Finding the Fourth Proportional to 452.35, 678.57 and 315.46

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Solution

The fourth proportional to 452.35, 678.57 and 315.46 is: 473.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.35 : 678.57 = 315.46 : x
  2. Step 2: Convert to fraction form
    452.35/678.57 = 315.46/x
  3. Step 3: Cross multiply
    452.35x = 678.57 × 315.46
  4. Step 4: Simplify right side
    452.35x = 214,061.69
  5. Step 5: Solve for x
    x = 214,061.69/452.35
  6. Step 6: Final answer
    x = 473.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.