Home / 687,826,103.24-949,175,087.30-420,349,424.47

Finding the Fourth Proportional to 687,826,103.24, 949,175,087.30 and 420,349,424.47

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Solution

The fourth proportional to 687,826,103.24, 949,175,087.30 and 420,349,424.47 is: 580,066,967.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,826,103.24 : 949,175,087.30 = 420,349,424.47 : x
  2. Step 2: Convert to fraction form
    687,826,103.24/949,175,087.30 = 420,349,424.47/x
  3. Step 3: Cross multiply
    687,826,103.24x = 949,175,087.30 × 420,349,424.47
  4. Step 4: Simplify right side
    687,826,103.24x = 398,985,201,667,280,960
  5. Step 5: Solve for x
    x = 398,985,201,667,280,960/687,826,103.24
  6. Step 6: Final answer
    x = 580,066,967.20

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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.