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Finding the Fourth Proportional to 1,155.93, 1,734.12 and 425.51

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Solution

The fourth proportional to 1,155.93, 1,734.12 and 425.51 is: 638.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.93 : 1,734.12 = 425.51 : x
  2. Step 2: Convert to fraction form
    1,155.93/1,734.12 = 425.51/x
  3. Step 3: Cross multiply
    1,155.93x = 1,734.12 × 425.51
  4. Step 4: Simplify right side
    1,155.93x = 737,876.73
  5. Step 5: Solve for x
    x = 737,876.73/1,155.93
  6. Step 6: Final answer
    x = 638.34

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1.5x scale

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.