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Finding the Fourth Proportional to 922.04, 1,272.78 and 612.28

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Solution

The fourth proportional to 922.04, 1,272.78 and 612.28 is: 845.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.04 : 1,272.78 = 612.28 : x
  2. Step 2: Convert to fraction form
    922.04/1,272.78 = 612.28/x
  3. Step 3: Cross multiply
    922.04x = 1,272.78 × 612.28
  4. Step 4: Simplify right side
    922.04x = 779,297.74
  5. Step 5: Solve for x
    x = 779,297.74/922.04
  6. Step 6: Final answer
    x = 845.19

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Double scale
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1.5x scale

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.