Home / 763,378.40-1,145,067.60-427,455.20

Finding the Fourth Proportional to 763,378.40, 1,145,067.60 and 427,455.20

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Solution

The fourth proportional to 763,378.40, 1,145,067.60 and 427,455.20 is: 641,182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,378.40 : 1,145,067.60 = 427,455.20 : x
  2. Step 2: Convert to fraction form
    763,378.40/1,145,067.60 = 427,455.20/x
  3. Step 3: Cross multiply
    763,378.40x = 1,145,067.60 × 427,455.20
  4. Step 4: Simplify right side
    763,378.40x = 489,465,099,971.52
  5. Step 5: Solve for x
    x = 489,465,099,971.52/763,378.40
  6. Step 6: Final answer
    x = 641,182.80

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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.