Home / 1,535.28-2,117.81-945.40

Finding the Fourth Proportional to 1,535.28, 2,117.81 and 945.40

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Solution

The fourth proportional to 1,535.28, 2,117.81 and 945.40 is: 1,304.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.28 : 2,117.81 = 945.40 : x
  2. Step 2: Convert to fraction form
    1,535.28/2,117.81 = 945.40/x
  3. Step 3: Cross multiply
    1,535.28x = 2,117.81 × 945.40
  4. Step 4: Simplify right side
    1,535.28x = 2,002,177.57
  5. Step 5: Solve for x
    x = 2,002,177.57/1,535.28
  6. Step 6: Final answer
    x = 1,304.11

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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.