Home / 1,321.48-1,982.23-347.58

Finding the Fourth Proportional to 1,321.48, 1,982.23 and 347.58

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Solution

The fourth proportional to 1,321.48, 1,982.23 and 347.58 is: 521.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.48 : 1,982.23 = 347.58 : x
  2. Step 2: Convert to fraction form
    1,321.48/1,982.23 = 347.58/x
  3. Step 3: Cross multiply
    1,321.48x = 1,982.23 × 347.58
  4. Step 4: Simplify right side
    1,321.48x = 688,983.50
  5. Step 5: Solve for x
    x = 688,983.50/1,321.48
  6. Step 6: Final answer
    x = 521.37

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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.