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Finding the Fourth Proportional to 920.05, 1,268.66 and 604.91

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Solution

The fourth proportional to 920.05, 1,268.66 and 604.91 is: 834.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.05 : 1,268.66 = 604.91 : x
  2. Step 2: Convert to fraction form
    920.05/1,268.66 = 604.91/x
  3. Step 3: Cross multiply
    920.05x = 1,268.66 × 604.91
  4. Step 4: Simplify right side
    920.05x = 767,415.75
  5. Step 5: Solve for x
    x = 767,415.75/920.05
  6. Step 6: Final answer
    x = 834.10

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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.