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Finding the Fourth Proportional to 744.65, 1,028.07 and 465.13

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Solution

The fourth proportional to 744.65, 1,028.07 and 465.13 is: 642.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.65 : 1,028.07 = 465.13 : x
  2. Step 2: Convert to fraction form
    744.65/1,028.07 = 465.13/x
  3. Step 3: Cross multiply
    744.65x = 1,028.07 × 465.13
  4. Step 4: Simplify right side
    744.65x = 478,181.06
  5. Step 5: Solve for x
    x = 478,181.06/744.65
  6. Step 6: Final answer
    x = 642.16

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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.