Home / 288,979,408.90-398,791,845.02-156,820,406.70

Finding the Fourth Proportional to 288,979,408.90, 398,791,845.02 and 156,820,406.70

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Solution

The fourth proportional to 288,979,408.90, 398,791,845.02 and 156,820,406.70 is: 216,412,302.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,979,408.90 : 398,791,845.02 = 156,820,406.70 : x
  2. Step 2: Convert to fraction form
    288,979,408.90/398,791,845.02 = 156,820,406.70/x
  3. Step 3: Cross multiply
    288,979,408.90x = 398,791,845.02 × 156,820,406.70
  4. Step 4: Simplify right side
    288,979,408.90x = 62,538,699,324,679,760
  5. Step 5: Solve for x
    x = 62,538,699,324,679,760/288,979,408.90
  6. Step 6: Final answer
    x = 216,412,302.74

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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.