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Finding the Fourth Proportional to 280,835,793.90, 420,686,820.45 and 280,835,793.90

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Solution

The fourth proportional to 280,835,793.90, 420,686,820.45 and 280,835,793.90 is: 420,686,820.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,835,793.90 : 420,686,820.45 = 280,835,793.90 : x
  2. Step 2: Convert to fraction form
    280,835,793.90/420,686,820.45 = 280,835,793.90/x
  3. Step 3: Cross multiply
    280,835,793.90x = 420,686,820.45 × 280,835,793.90
  4. Step 4: Simplify right side
    280,835,793.90x = 118,143,917,204,342,496
  5. Step 5: Solve for x
    x = 118,143,917,204,342,496/280,835,793.90
  6. Step 6: Final answer
    x = 420,686,820.45

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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.