Home / 1,312.24-1,966.61-489.68

Finding the Fourth Proportional to 1,312.24, 1,966.61 and 489.68

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Solution

The fourth proportional to 1,312.24, 1,966.61 and 489.68 is: 733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.24 : 1,966.61 = 489.68 : x
  2. Step 2: Convert to fraction form
    1,312.24/1,966.61 = 489.68/x
  3. Step 3: Cross multiply
    1,312.24x = 1,966.61 × 489.68
  4. Step 4: Simplify right side
    1,312.24x = 963,012.05
  5. Step 5: Solve for x
    x = 963,012.05/1,312.24
  6. Step 6: Final answer
    x = 733.87

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1.5x scale

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.