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Finding the Fourth Proportional to 744.98, 1,027.80 and 465.11

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Solution

The fourth proportional to 744.98, 1,027.80 and 465.11 is: 641.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.98 : 1,027.80 = 465.11 : x
  2. Step 2: Convert to fraction form
    744.98/1,027.80 = 465.11/x
  3. Step 3: Cross multiply
    744.98x = 1,027.80 × 465.11
  4. Step 4: Simplify right side
    744.98x = 478,039.81
  5. Step 5: Solve for x
    x = 478,039.81/744.98
  6. Step 6: Final answer
    x = 641.69

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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.