Home / 513,187,040.57-708,203,378.79-278,238,155.45

Finding the Fourth Proportional to 513,187,040.57, 708,203,378.79 and 278,238,155.45

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Solution

The fourth proportional to 513,187,040.57, 708,203,378.79 and 278,238,155.45 is: 383,971,507.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,187,040.57 : 708,203,378.79 = 278,238,155.45 : x
  2. Step 2: Convert to fraction form
    513,187,040.57/708,203,378.79 = 278,238,155.45/x
  3. Step 3: Cross multiply
    513,187,040.57x = 708,203,378.79 × 278,238,155.45
  4. Step 4: Simplify right side
    513,187,040.57x = 197,049,201,797,987,232
  5. Step 5: Solve for x
    x = 197,049,201,797,987,232/513,187,040.57
  6. Step 6: Final answer
    x = 383,971,507.89

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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.