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Finding the Fourth Proportional to 815,059,916.10, 1,222,589,874.15 and 815,059,916.10

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Solution

The fourth proportional to 815,059,916.10, 1,222,589,874.15 and 815,059,916.10 is: 1,222,589,874.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,059,916.10 : 1,222,589,874.15 = 815,059,916.10 : x
  2. Step 2: Convert to fraction form
    815,059,916.10/1,222,589,874.15 = 815,059,916.10/x
  3. Step 3: Cross multiply
    815,059,916.10x = 1,222,589,874.15 × 815,059,916.10
  4. Step 4: Simplify right side
    815,059,916.10x = 996,484,000,249,408,640
  5. Step 5: Solve for x
    x = 996,484,000,249,408,640/815,059,916.10
  6. Step 6: Final answer
    x = 1,222,589,874.15

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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.