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Finding the Fourth Proportional to 517,979,660.80, 776,969,491.20 and 517,979,660.80

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Solution

The fourth proportional to 517,979,660.80, 776,969,491.20 and 517,979,660.80 is: 776,969,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,979,660.80 : 776,969,491.20 = 517,979,660.80 : x
  2. Step 2: Convert to fraction form
    517,979,660.80/776,969,491.20 = 517,979,660.80/x
  3. Step 3: Cross multiply
    517,979,660.80x = 776,969,491.20 × 517,979,660.80
  4. Step 4: Simplify right side
    517,979,660.80x = 402,454,393,503,724,608
  5. Step 5: Solve for x
    x = 402,454,393,503,724,608/517,979,660.80
  6. Step 6: Final answer
    x = 776,969,491.20

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Double scale
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Similar ratio
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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.