Home / 1,226.29-1,839.59-485.95

Finding the Fourth Proportional to 1,226.29, 1,839.59 and 485.95

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Solution

The fourth proportional to 1,226.29, 1,839.59 and 485.95 is: 728.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.29 : 1,839.59 = 485.95 : x
  2. Step 2: Convert to fraction form
    1,226.29/1,839.59 = 485.95/x
  3. Step 3: Cross multiply
    1,226.29x = 1,839.59 × 485.95
  4. Step 4: Simplify right side
    1,226.29x = 893,948.76
  5. Step 5: Solve for x
    x = 893,948.76/1,226.29
  6. Step 6: Final answer
    x = 728.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.