Home / 870,992,000.20-1,306,488,000.30-386,317,808.20

Finding the Fourth Proportional to 870,992,000.20, 1,306,488,000.30 and 386,317,808.20

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Solution

The fourth proportional to 870,992,000.20, 1,306,488,000.30 and 386,317,808.20 is: 579,476,712.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,992,000.20 : 1,306,488,000.30 = 386,317,808.20 : x
  2. Step 2: Convert to fraction form
    870,992,000.20/1,306,488,000.30 = 386,317,808.20/x
  3. Step 3: Cross multiply
    870,992,000.20x = 1,306,488,000.30 × 386,317,808.20
  4. Step 4: Simplify right side
    870,992,000.20x = 504,719,580,715,496,896
  5. Step 5: Solve for x
    x = 504,719,580,715,496,896/870,992,000.20
  6. Step 6: Final answer
    x = 579,476,712.30

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Double scale
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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.