Home / 1,534.40-2,117.56-905.30

Finding the Fourth Proportional to 1,534.40, 2,117.56 and 905.30

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Solution

The fourth proportional to 1,534.40, 2,117.56 and 905.30 is: 1,249.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,534.40 : 2,117.56 = 905.30 : x
  2. Step 2: Convert to fraction form
    1,534.40/2,117.56 = 905.30/x
  3. Step 3: Cross multiply
    1,534.40x = 2,117.56 × 905.30
  4. Step 4: Simplify right side
    1,534.40x = 1,917,022.16
  5. Step 5: Solve for x
    x = 1,917,022.16/1,534.40
  6. Step 6: Final answer
    x = 1,249.36

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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.