Home / 1,320.14-1,979.58-670.52

Finding the Fourth Proportional to 1,320.14, 1,979.58 and 670.52

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Solution

The fourth proportional to 1,320.14, 1,979.58 and 670.52 is: 1,005.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.14 : 1,979.58 = 670.52 : x
  2. Step 2: Convert to fraction form
    1,320.14/1,979.58 = 670.52/x
  3. Step 3: Cross multiply
    1,320.14x = 1,979.58 × 670.52
  4. Step 4: Simplify right side
    1,320.14x = 1,327,347.98
  5. Step 5: Solve for x
    x = 1,327,347.98/1,320.14
  6. Step 6: Final answer
    x = 1,005.46

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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.