Home / 1,316.12-1,974.25-438.56

Finding the Fourth Proportional to 1,316.12, 1,974.25 and 438.56

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Solution

The fourth proportional to 1,316.12, 1,974.25 and 438.56 is: 657.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.12 : 1,974.25 = 438.56 : x
  2. Step 2: Convert to fraction form
    1,316.12/1,974.25 = 438.56/x
  3. Step 3: Cross multiply
    1,316.12x = 1,974.25 × 438.56
  4. Step 4: Simplify right side
    1,316.12x = 865,827.08
  5. Step 5: Solve for x
    x = 865,827.08/1,316.12
  6. Step 6: Final answer
    x = 657.86

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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.