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Finding the Fourth Proportional to 1,276,905,812.60, 1,915,358,718.90 and 1,276,905,812.60

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Solution

The fourth proportional to 1,276,905,812.60, 1,915,358,718.90 and 1,276,905,812.60 is: 1,915,358,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276,905,812.60 : 1,915,358,718.90 = 1,276,905,812.60 : x
  2. Step 2: Convert to fraction form
    1,276,905,812.60/1,915,358,718.90 = 1,276,905,812.60/x
  3. Step 3: Cross multiply
    1,276,905,812.60x = 1,915,358,718.90 × 1,276,905,812.60
  4. Step 4: Simplify right side
    1,276,905,812.60x = 2,445,732,681,377,499,648
  5. Step 5: Solve for x
    x = 2,445,732,681,377,499,648/1,276,905,812.60
  6. Step 6: Final answer
    x = 1,915,358,718.90

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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.