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Finding the Fourth Proportional to 1,550.04, 2,139.32 and 920.60

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Solution

The fourth proportional to 1,550.04, 2,139.32 and 920.60 is: 1,270.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.04 : 2,139.32 = 920.60 : x
  2. Step 2: Convert to fraction form
    1,550.04/2,139.32 = 920.60/x
  3. Step 3: Cross multiply
    1,550.04x = 2,139.32 × 920.60
  4. Step 4: Simplify right side
    1,550.04x = 1,969,457.99
  5. Step 5: Solve for x
    x = 1,969,457.99/1,550.04
  6. Step 6: Final answer
    x = 1,270.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.