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Finding the Fourth Proportional to 638,442,993.80, 957,664,490.70 and 638,442,993.80

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Solution

The fourth proportional to 638,442,993.80, 957,664,490.70 and 638,442,993.80 is: 957,664,490.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,442,993.80 : 957,664,490.70 = 638,442,993.80 : x
  2. Step 2: Convert to fraction form
    638,442,993.80/957,664,490.70 = 638,442,993.80/x
  3. Step 3: Cross multiply
    638,442,993.80x = 957,664,490.70 × 638,442,993.80
  4. Step 4: Simplify right side
    638,442,993.80x = 611,414,184,498,460,288
  5. Step 5: Solve for x
    x = 611,414,184,498,460,288/638,442,993.80
  6. Step 6: Final answer
    x = 957,664,490.70

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Double scale
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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.