Home / 687,736,801.80-1,031,605,202.70-647,392,840.20

Finding the Fourth Proportional to 687,736,801.80, 1,031,605,202.70 and 647,392,840.20

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Solution

The fourth proportional to 687,736,801.80, 1,031,605,202.70 and 647,392,840.20 is: 971,089,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,736,801.80 : 1,031,605,202.70 = 647,392,840.20 : x
  2. Step 2: Convert to fraction form
    687,736,801.80/1,031,605,202.70 = 647,392,840.20/x
  3. Step 3: Cross multiply
    687,736,801.80x = 1,031,605,202.70 × 647,392,840.20
  4. Step 4: Simplify right side
    687,736,801.80x = 667,853,822,141,049,728
  5. Step 5: Solve for x
    x = 667,853,822,141,049,728/687,736,801.80
  6. Step 6: Final answer
    x = 971,089,260.30

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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.