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Finding the Fourth Proportional to 802.89, 1,202.25 and 688.07

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Solution

The fourth proportional to 802.89, 1,202.25 and 688.07 is: 1,030.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.89 : 1,202.25 = 688.07 : x
  2. Step 2: Convert to fraction form
    802.89/1,202.25 = 688.07/x
  3. Step 3: Cross multiply
    802.89x = 1,202.25 × 688.07
  4. Step 4: Simplify right side
    802.89x = 827,232.16
  5. Step 5: Solve for x
    x = 827,232.16/802.89
  6. Step 6: Final answer
    x = 1,030.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.