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Finding the Fourth Proportional to 756.96, 1,045.38 and 462.45

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Solution

The fourth proportional to 756.96, 1,045.38 and 462.45 is: 638.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.96 : 1,045.38 = 462.45 : x
  2. Step 2: Convert to fraction form
    756.96/1,045.38 = 462.45/x
  3. Step 3: Cross multiply
    756.96x = 1,045.38 × 462.45
  4. Step 4: Simplify right side
    756.96x = 483,435.98
  5. Step 5: Solve for x
    x = 483,435.98/756.96
  6. Step 6: Final answer
    x = 638.65

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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.