Home / 1,534.46-2,117.65-905.36

Finding the Fourth Proportional to 1,534.46, 2,117.65 and 905.36

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Solution

The fourth proportional to 1,534.46, 2,117.65 and 905.36 is: 1,249.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,534.46 : 2,117.65 = 905.36 : x
  2. Step 2: Convert to fraction form
    1,534.46/2,117.65 = 905.36/x
  3. Step 3: Cross multiply
    1,534.46x = 2,117.65 × 905.36
  4. Step 4: Simplify right side
    1,534.46x = 1,917,225.78
  5. Step 5: Solve for x
    x = 1,917,225.78/1,534.46
  6. Step 6: Final answer
    x = 1,249.44

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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.