Home / 643,723,013.74-888,277,041.39-361,410,316.78

Finding the Fourth Proportional to 643,723,013.74, 888,277,041.39 and 361,410,316.78

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Solution

The fourth proportional to 643,723,013.74, 888,277,041.39 and 361,410,316.78 is: 498,712,148.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,723,013.74 : 888,277,041.39 = 361,410,316.78 : x
  2. Step 2: Convert to fraction form
    643,723,013.74/888,277,041.39 = 361,410,316.78/x
  3. Step 3: Cross multiply
    643,723,013.74x = 888,277,041.39 × 361,410,316.78
  4. Step 4: Simplify right side
    643,723,013.74x = 321,032,486,912,719,680
  5. Step 5: Solve for x
    x = 321,032,486,912,719,680/643,723,013.74
  6. Step 6: Final answer
    x = 498,712,148.02

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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.