Home / 687,826,105.24-949,175,090.06-420,349,426.47

Finding the Fourth Proportional to 687,826,105.24, 949,175,090.06 and 420,349,426.47

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Solution

The fourth proportional to 687,826,105.24, 949,175,090.06 and 420,349,426.47 is: 580,066,969.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,826,105.24 : 949,175,090.06 = 420,349,426.47 : x
  2. Step 2: Convert to fraction form
    687,826,105.24/949,175,090.06 = 420,349,426.47/x
  3. Step 3: Cross multiply
    687,826,105.24x = 949,175,090.06 × 420,349,426.47
  4. Step 4: Simplify right side
    687,826,105.24x = 398,985,204,726,331,584
  5. Step 5: Solve for x
    x = 398,985,204,726,331,584/687,826,105.24
  6. Step 6: Final answer
    x = 580,066,969.96

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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.