Home / 645,145.20-967,717.80-330,217.20

Finding the Fourth Proportional to 645,145.20, 967,717.80 and 330,217.20

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Solution

The fourth proportional to 645,145.20, 967,717.80 and 330,217.20 is: 495,325.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,145.20 : 967,717.80 = 330,217.20 : x
  2. Step 2: Convert to fraction form
    645,145.20/967,717.80 = 330,217.20/x
  3. Step 3: Cross multiply
    645,145.20x = 967,717.80 × 330,217.20
  4. Step 4: Simplify right side
    645,145.20x = 319,557,062,306.16
  5. Step 5: Solve for x
    x = 319,557,062,306.16/645,145.20
  6. Step 6: Final answer
    x = 495,325.80

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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.