Home / 1,320.10-1,980.05-346.17

Finding the Fourth Proportional to 1,320.10, 1,980.05 and 346.17

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Solution

The fourth proportional to 1,320.10, 1,980.05 and 346.17 is: 519.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.10 : 1,980.05 = 346.17 : x
  2. Step 2: Convert to fraction form
    1,320.10/1,980.05 = 346.17/x
  3. Step 3: Cross multiply
    1,320.10x = 1,980.05 × 346.17
  4. Step 4: Simplify right side
    1,320.10x = 685,439.60
  5. Step 5: Solve for x
    x = 685,439.60/1,320.10
  6. Step 6: Final answer
    x = 519.23

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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.