Home / 1,316.51-1,974.80-438.73

Finding the Fourth Proportional to 1,316.51, 1,974.80 and 438.73

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Solution

The fourth proportional to 1,316.51, 1,974.80 and 438.73 is: 658.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.51 : 1,974.80 = 438.73 : x
  2. Step 2: Convert to fraction form
    1,316.51/1,974.80 = 438.73/x
  3. Step 3: Cross multiply
    1,316.51x = 1,974.80 × 438.73
  4. Step 4: Simplify right side
    1,316.51x = 866,404.00
  5. Step 5: Solve for x
    x = 866,404.00/1,316.51
  6. Step 6: Final answer
    x = 658.11

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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.