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Finding the Fourth Proportional to 1,424.92, 2,132.93 and 905.51

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Solution

The fourth proportional to 1,424.92, 2,132.93 and 905.51 is: 1,355.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.92 : 2,132.93 = 905.51 : x
  2. Step 2: Convert to fraction form
    1,424.92/2,132.93 = 905.51/x
  3. Step 3: Cross multiply
    1,424.92x = 2,132.93 × 905.51
  4. Step 4: Simplify right side
    1,424.92x = 1,931,374.25
  5. Step 5: Solve for x
    x = 1,931,374.25/1,424.92
  6. Step 6: Final answer
    x = 1,355.43

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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.