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Finding the Fourth Proportional to 817.63, 1,127.86 and 503.04

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Solution

The fourth proportional to 817.63, 1,127.86 and 503.04 is: 693.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.63 : 1,127.86 = 503.04 : x
  2. Step 2: Convert to fraction form
    817.63/1,127.86 = 503.04/x
  3. Step 3: Cross multiply
    817.63x = 1,127.86 × 503.04
  4. Step 4: Simplify right side
    817.63x = 567,358.69
  5. Step 5: Solve for x
    x = 567,358.69/817.63
  6. Step 6: Final answer
    x = 693.91

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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.