Home / 500,855,816.72-691,077,524.82-289,158,978.91

Finding the Fourth Proportional to 500,855,816.72, 691,077,524.82 and 289,158,978.91

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Solution

The fourth proportional to 500,855,816.72, 691,077,524.82 and 289,158,978.91 is: 398,979,635.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,855,816.72 : 691,077,524.82 = 289,158,978.91 : x
  2. Step 2: Convert to fraction form
    500,855,816.72/691,077,524.82 = 289,158,978.91/x
  3. Step 3: Cross multiply
    500,855,816.72x = 691,077,524.82 × 289,158,978.91
  4. Step 4: Simplify right side
    500,855,816.72x = 199,831,271,424,601,408
  5. Step 5: Solve for x
    x = 199,831,271,424,601,408/500,855,816.72
  6. Step 6: Final answer
    x = 398,979,635.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.