Home / 427,327,876.63-640,990,818.37-280,700,979.63

Finding the Fourth Proportional to 427,327,876.63, 640,990,818.37 and 280,700,979.63

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Solution

The fourth proportional to 427,327,876.63, 640,990,818.37 and 280,700,979.63 is: 421,050,814.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,327,876.63 : 640,990,818.37 = 280,700,979.63 : x
  2. Step 2: Convert to fraction form
    427,327,876.63/640,990,818.37 = 280,700,979.63/x
  3. Step 3: Cross multiply
    427,327,876.63x = 640,990,818.37 × 280,700,979.63
  4. Step 4: Simplify right side
    427,327,876.63x = 179,926,750,650,294,400
  5. Step 5: Solve for x
    x = 179,926,750,650,294,400/427,327,876.63
  6. Step 6: Final answer
    x = 421,050,814.82

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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.