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Finding the Fourth Proportional to 915.35, 1,259.19 and 802.81

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Solution

The fourth proportional to 915.35, 1,259.19 and 802.81 is: 1,104.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.35 : 1,259.19 = 802.81 : x
  2. Step 2: Convert to fraction form
    915.35/1,259.19 = 802.81/x
  3. Step 3: Cross multiply
    915.35x = 1,259.19 × 802.81
  4. Step 4: Simplify right side
    915.35x = 1,010,884.03
  5. Step 5: Solve for x
    x = 1,010,884.03/915.35
  6. Step 6: Final answer
    x = 1,104.37

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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.