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Finding the Fourth Proportional to 1,264.83, 1,746.81 and 984.21

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Solution

The fourth proportional to 1,264.83, 1,746.81 and 984.21 is: 1,359.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.83 : 1,746.81 = 984.21 : x
  2. Step 2: Convert to fraction form
    1,264.83/1,746.81 = 984.21/x
  3. Step 3: Cross multiply
    1,264.83x = 1,746.81 × 984.21
  4. Step 4: Simplify right side
    1,264.83x = 1,719,227.87
  5. Step 5: Solve for x
    x = 1,719,227.87/1,264.83
  6. Step 6: Final answer
    x = 1,359.26

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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.