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Finding the Fourth Proportional to 412.15, 568.07 and 312.53

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Solution

The fourth proportional to 412.15, 568.07 and 312.53 is: 430.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.15 : 568.07 = 312.53 : x
  2. Step 2: Convert to fraction form
    412.15/568.07 = 312.53/x
  3. Step 3: Cross multiply
    412.15x = 568.07 × 312.53
  4. Step 4: Simplify right side
    412.15x = 177,541.12
  5. Step 5: Solve for x
    x = 177,541.12/412.15
  6. Step 6: Final answer
    x = 430.77

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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.