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Finding the Fourth Proportional to 802.74, 1,105.02 and 699.06

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Solution

The fourth proportional to 802.74, 1,105.02 and 699.06 is: 962.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.74 : 1,105.02 = 699.06 : x
  2. Step 2: Convert to fraction form
    802.74/1,105.02 = 699.06/x
  3. Step 3: Cross multiply
    802.74x = 1,105.02 × 699.06
  4. Step 4: Simplify right side
    802.74x = 772,475.28
  5. Step 5: Solve for x
    x = 772,475.28/802.74
  6. Step 6: Final answer
    x = 962.30

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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.