Home / 1,316.90-1,974.86-439.24

Finding the Fourth Proportional to 1,316.90, 1,974.86 and 439.24

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Solution

The fourth proportional to 1,316.90, 1,974.86 and 439.24 is: 658.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.90 : 1,974.86 = 439.24 : x
  2. Step 2: Convert to fraction form
    1,316.90/1,974.86 = 439.24/x
  3. Step 3: Cross multiply
    1,316.90x = 1,974.86 × 439.24
  4. Step 4: Simplify right side
    1,316.90x = 867,437.51
  5. Step 5: Solve for x
    x = 867,437.51/1,316.90
  6. Step 6: Final answer
    x = 658.70

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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.