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Finding the Fourth Proportional to 817.51, 1,128.03 and 468.13

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Solution

The fourth proportional to 817.51, 1,128.03 and 468.13 is: 645.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.51 : 1,128.03 = 468.13 : x
  2. Step 2: Convert to fraction form
    817.51/1,128.03 = 468.13/x
  3. Step 3: Cross multiply
    817.51x = 1,128.03 × 468.13
  4. Step 4: Simplify right side
    817.51x = 528,059.04
  5. Step 5: Solve for x
    x = 528,059.04/817.51
  6. Step 6: Final answer
    x = 645.94

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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.