Home / 687,731,407.80-1,031,597,111.70-647,387,446.20

Finding the Fourth Proportional to 687,731,407.80, 1,031,597,111.70 and 647,387,446.20

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Solution

The fourth proportional to 687,731,407.80, 1,031,597,111.70 and 647,387,446.20 is: 971,081,169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,731,407.80 : 1,031,597,111.70 = 647,387,446.20 : x
  2. Step 2: Convert to fraction form
    687,731,407.80/1,031,597,111.70 = 647,387,446.20/x
  3. Step 3: Cross multiply
    687,731,407.80x = 1,031,597,111.70 × 647,387,446.20
  4. Step 4: Simplify right side
    687,731,407.80x = 667,843,019,650,759,168
  5. Step 5: Solve for x
    x = 667,843,019,650,759,168/687,731,407.80
  6. Step 6: Final answer
    x = 971,081,169.30

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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.