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Finding the Fourth Proportional to 1,550.04, 2,139.02 and 851.40

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Solution

The fourth proportional to 1,550.04, 2,139.02 and 851.40 is: 1,174.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.04 : 2,139.02 = 851.40 : x
  2. Step 2: Convert to fraction form
    1,550.04/2,139.02 = 851.40/x
  3. Step 3: Cross multiply
    1,550.04x = 2,139.02 × 851.40
  4. Step 4: Simplify right side
    1,550.04x = 1,821,161.63
  5. Step 5: Solve for x
    x = 1,821,161.63/1,550.04
  6. Step 6: Final answer
    x = 1,174.91

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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.