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Finding the Fourth Proportional to 425,612,701.80, 638,419,052.70 and 280,210,444.20

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Solution

The fourth proportional to 425,612,701.80, 638,419,052.70 and 280,210,444.20 is: 420,315,666.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,612,701.80 : 638,419,052.70 = 280,210,444.20 : x
  2. Step 2: Convert to fraction form
    425,612,701.80/638,419,052.70 = 280,210,444.20/x
  3. Step 3: Cross multiply
    425,612,701.80x = 638,419,052.70 × 280,210,444.20
  4. Step 4: Simplify right side
    425,612,701.80x = 178,891,686,342,810,208
  5. Step 5: Solve for x
    x = 178,891,686,342,810,208/425,612,701.80
  6. Step 6: Final answer
    x = 420,315,666.30

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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.