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Finding the Fourth Proportional to 751.32, 1,036.80 and 456.48

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Solution

The fourth proportional to 751.32, 1,036.80 and 456.48 is: 629.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.32 : 1,036.80 = 456.48 : x
  2. Step 2: Convert to fraction form
    751.32/1,036.80 = 456.48/x
  3. Step 3: Cross multiply
    751.32x = 1,036.80 × 456.48
  4. Step 4: Simplify right side
    751.32x = 473,278.46
  5. Step 5: Solve for x
    x = 473,278.46/751.32
  6. Step 6: Final answer
    x = 629.93

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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.