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Finding the Fourth Proportional to 922.95, 1,279.99 and 845.10

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Solution

The fourth proportional to 922.95, 1,279.99 and 845.10 is: 1,172.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.95 : 1,279.99 = 845.10 : x
  2. Step 2: Convert to fraction form
    922.95/1,279.99 = 845.10/x
  3. Step 3: Cross multiply
    922.95x = 1,279.99 × 845.10
  4. Step 4: Simplify right side
    922.95x = 1,081,719.55
  5. Step 5: Solve for x
    x = 1,081,719.55/922.95
  6. Step 6: Final answer
    x = 1,172.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.