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Finding the Fourth Proportional to 1,434.80, 2,011.60 and 1,434.80

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Solution

The fourth proportional to 1,434.80, 2,011.60 and 1,434.80 is: 2,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.80 : 2,011.60 = 1,434.80 : x
  2. Step 2: Convert to fraction form
    1,434.80/2,011.60 = 1,434.80/x
  3. Step 3: Cross multiply
    1,434.80x = 2,011.60 × 1,434.80
  4. Step 4: Simplify right side
    1,434.80x = 2,886,243.68
  5. Step 5: Solve for x
    x = 2,886,243.68/1,434.80
  6. Step 6: Final answer
    x = 2,011.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.