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Finding the Fourth Proportional to 1,424.84, 1,966.66 and 983.48

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Solution

The fourth proportional to 1,424.84, 1,966.66 and 983.48 is: 1,357.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.84 : 1,966.66 = 983.48 : x
  2. Step 2: Convert to fraction form
    1,424.84/1,966.66 = 983.48/x
  3. Step 3: Cross multiply
    1,424.84x = 1,966.66 × 983.48
  4. Step 4: Simplify right side
    1,424.84x = 1,934,170.78
  5. Step 5: Solve for x
    x = 1,934,170.78/1,424.84
  6. Step 6: Final answer
    x = 1,357.47

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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.