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Finding the Fourth Proportional to 926.03, 1,389.02 and 902.78

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Solution

The fourth proportional to 926.03, 1,389.02 and 902.78 is: 1,354.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.03 : 1,389.02 = 902.78 : x
  2. Step 2: Convert to fraction form
    926.03/1,389.02 = 902.78/x
  3. Step 3: Cross multiply
    926.03x = 1,389.02 × 902.78
  4. Step 4: Simplify right side
    926.03x = 1,253,973.23
  5. Step 5: Solve for x
    x = 1,253,973.23/926.03
  6. Step 6: Final answer
    x = 1,354.14

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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.