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Finding the Fourth Proportional to 920.17, 1,268.17 and 671.10

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Solution

The fourth proportional to 920.17, 1,268.17 and 671.10 is: 924.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.17 : 1,268.17 = 671.10 : x
  2. Step 2: Convert to fraction form
    920.17/1,268.17 = 671.10/x
  3. Step 3: Cross multiply
    920.17x = 1,268.17 × 671.10
  4. Step 4: Simplify right side
    920.17x = 851,068.89
  5. Step 5: Solve for x
    x = 851,068.89/920.17
  6. Step 6: Final answer
    x = 924.90

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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.