Home / 398,468,318.76-550,062,604.83-257,408,318.20

Finding the Fourth Proportional to 398,468,318.76, 550,062,604.83 and 257,408,318.20

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Solution

The fourth proportional to 398,468,318.76, 550,062,604.83 and 257,408,318.20 is: 355,337,384.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,468,318.76 : 550,062,604.83 = 257,408,318.20 : x
  2. Step 2: Convert to fraction form
    398,468,318.76/550,062,604.83 = 257,408,318.20/x
  3. Step 3: Cross multiply
    398,468,318.76x = 550,062,604.83 × 257,408,318.20
  4. Step 4: Simplify right side
    398,468,318.76x = 141,590,690,014,001,504
  5. Step 5: Solve for x
    x = 141,590,690,014,001,504/398,468,318.76
  6. Step 6: Final answer
    x = 355,337,384.05

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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.