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Finding the Fourth Proportional to 621,694,329.90, 871,646,081.70 and 621,694,329.90

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Solution

The fourth proportional to 621,694,329.90, 871,646,081.70 and 621,694,329.90 is: 871,646,081.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,694,329.90 : 871,646,081.70 = 621,694,329.90 : x
  2. Step 2: Convert to fraction form
    621,694,329.90/871,646,081.70 = 621,694,329.90/x
  3. Step 3: Cross multiply
    621,694,329.90x = 871,646,081.70 × 621,694,329.90
  4. Step 4: Simplify right side
    621,694,329.90x = 541,897,426,672,442,176
  5. Step 5: Solve for x
    x = 541,897,426,672,442,176/621,694,329.90
  6. Step 6: Final answer
    x = 871,646,081.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.