Home / 687,745,976.60-1,031,618,964.90-442,857,963.80

Finding the Fourth Proportional to 687,745,976.60, 1,031,618,964.90 and 442,857,963.80

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Solution

The fourth proportional to 687,745,976.60, 1,031,618,964.90 and 442,857,963.80 is: 664,286,945.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,745,976.60 : 1,031,618,964.90 = 442,857,963.80 : x
  2. Step 2: Convert to fraction form
    687,745,976.60/1,031,618,964.90 = 442,857,963.80/x
  3. Step 3: Cross multiply
    687,745,976.60x = 1,031,618,964.90 × 442,857,963.80
  4. Step 4: Simplify right side
    687,745,976.60x = 456,860,674,213,077,696
  5. Step 5: Solve for x
    x = 456,860,674,213,077,696/687,745,976.60
  6. Step 6: Final answer
    x = 664,286,945.70

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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.