Home / 1,320.55-1,980.95-346.66

Finding the Fourth Proportional to 1,320.55, 1,980.95 and 346.66

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Solution

The fourth proportional to 1,320.55, 1,980.95 and 346.66 is: 520.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.55 : 1,980.95 = 346.66 : x
  2. Step 2: Convert to fraction form
    1,320.55/1,980.95 = 346.66/x
  3. Step 3: Cross multiply
    1,320.55x = 1,980.95 × 346.66
  4. Step 4: Simplify right side
    1,320.55x = 686,716.13
  5. Step 5: Solve for x
    x = 686,716.13/1,320.55
  6. Step 6: Final answer
    x = 520.02

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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.