Home / 769,434.80-1,154,152.20-415,140.80

Finding the Fourth Proportional to 769,434.80, 1,154,152.20 and 415,140.80

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Solution

The fourth proportional to 769,434.80, 1,154,152.20 and 415,140.80 is: 622,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,434.80 : 1,154,152.20 = 415,140.80 : x
  2. Step 2: Convert to fraction form
    769,434.80/1,154,152.20 = 415,140.80/x
  3. Step 3: Cross multiply
    769,434.80x = 1,154,152.20 × 415,140.80
  4. Step 4: Simplify right side
    769,434.80x = 479,135,667,629.76
  5. Step 5: Solve for x
    x = 479,135,667,629.76/769,434.80
  6. Step 6: Final answer
    x = 622,711.20

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Double scale
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Similar ratio
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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.