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Finding the Fourth Proportional to 621,694,328.40, 871,646,079.60 and 621,694,328.40

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Solution

The fourth proportional to 621,694,328.40, 871,646,079.60 and 621,694,328.40 is: 871,646,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,694,328.40 : 871,646,079.60 = 621,694,328.40 : x
  2. Step 2: Convert to fraction form
    621,694,328.40/871,646,079.60 = 621,694,328.40/x
  3. Step 3: Cross multiply
    621,694,328.40x = 871,646,079.60 × 621,694,328.40
  4. Step 4: Simplify right side
    621,694,328.40x = 541,897,424,059,414,912
  5. Step 5: Solve for x
    x = 541,897,424,059,414,912/621,694,328.40
  6. Step 6: Final answer
    x = 871,646,079.60

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1.5x scale

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.