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Finding the Fourth Proportional to 927,297,813.80, 1,390,946,720.70 and 915,204,578.60

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Solution

The fourth proportional to 927,297,813.80, 1,390,946,720.70 and 915,204,578.60 is: 1,372,806,867.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    927,297,813.80 : 1,390,946,720.70 = 915,204,578.60 : x
  2. Step 2: Convert to fraction form
    927,297,813.80/1,390,946,720.70 = 915,204,578.60/x
  3. Step 3: Cross multiply
    927,297,813.80x = 1,390,946,720.70 × 915,204,578.60
  4. Step 4: Simplify right side
    927,297,813.80x = 1,273,000,807,373,295,360
  5. Step 5: Solve for x
    x = 1,273,000,807,373,295,360/927,297,813.80
  6. Step 6: Final answer
    x = 1,372,806,867.90

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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.