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Finding the Fourth Proportional to 1,954.29, 2,931.44 and 980.17

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Solution

The fourth proportional to 1,954.29, 2,931.44 and 980.17 is: 1,470.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.29 : 2,931.44 = 980.17 : x
  2. Step 2: Convert to fraction form
    1,954.29/2,931.44 = 980.17/x
  3. Step 3: Cross multiply
    1,954.29x = 2,931.44 × 980.17
  4. Step 4: Simplify right side
    1,954.29x = 2,873,302.83
  5. Step 5: Solve for x
    x = 2,873,302.83/1,954.29
  6. Step 6: Final answer
    x = 1,470.25

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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.