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Finding the Fourth Proportional to 751.92, 1,038.32 and 472.65

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Solution

The fourth proportional to 751.92, 1,038.32 and 472.65 is: 652.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.92 : 1,038.32 = 472.65 : x
  2. Step 2: Convert to fraction form
    751.92/1,038.32 = 472.65/x
  3. Step 3: Cross multiply
    751.92x = 1,038.32 × 472.65
  4. Step 4: Simplify right side
    751.92x = 490,759.58
  5. Step 5: Solve for x
    x = 490,759.58/751.92
  6. Step 6: Final answer
    x = 652.68

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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.