Home / 1,137.50-1,569.30-839.46

Finding the Fourth Proportional to 1,137.50, 1,569.30 and 839.46

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Solution

The fourth proportional to 1,137.50, 1,569.30 and 839.46 is: 1,158.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.50 : 1,569.30 = 839.46 : x
  2. Step 2: Convert to fraction form
    1,137.50/1,569.30 = 839.46/x
  3. Step 3: Cross multiply
    1,137.50x = 1,569.30 × 839.46
  4. Step 4: Simplify right side
    1,137.50x = 1,317,364.58
  5. Step 5: Solve for x
    x = 1,317,364.58/1,137.50
  6. Step 6: Final answer
    x = 1,158.13

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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.