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Finding the Fourth Proportional to 687,992,500.45, 965,910,478.55 and 687,992,500.45

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Solution

The fourth proportional to 687,992,500.45, 965,910,478.55 and 687,992,500.45 is: 965,910,478.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,992,500.45 : 965,910,478.55 = 687,992,500.45 : x
  2. Step 2: Convert to fraction form
    687,992,500.45/965,910,478.55 = 687,992,500.45/x
  3. Step 3: Cross multiply
    687,992,500.45x = 965,910,478.55 × 687,992,500.45
  4. Step 4: Simplify right side
    687,992,500.45x = 664,539,165,348,470,656
  5. Step 5: Solve for x
    x = 664,539,165,348,470,656/687,992,500.45
  6. Step 6: Final answer
    x = 965,910,478.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.