Home / 643,286.20-964,929.30-288,992.20

Finding the Fourth Proportional to 643,286.20, 964,929.30 and 288,992.20

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Solution

The fourth proportional to 643,286.20, 964,929.30 and 288,992.20 is: 433,488.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,286.20 : 964,929.30 = 288,992.20 : x
  2. Step 2: Convert to fraction form
    643,286.20/964,929.30 = 288,992.20/x
  3. Step 3: Cross multiply
    643,286.20x = 964,929.30 × 288,992.20
  4. Step 4: Simplify right side
    643,286.20x = 278,857,041,251.46
  5. Step 5: Solve for x
    x = 278,857,041,251.46/643,286.20
  6. Step 6: Final answer
    x = 433,488.30

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Half scale
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Double scale
Find fourth proportional to 643,287.20, 964,930.80 and 288,993.20
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.