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Finding the Fourth Proportional to 346,831, 478,626.78 and 187,855

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Solution

The fourth proportional to 346,831, 478,626.78 and 187,855 is: 259,239.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,831 : 478,626.78 = 187,855 : x
  2. Step 2: Convert to fraction form
    346,831/478,626.78 = 187,855/x
  3. Step 3: Cross multiply
    346,831x = 478,626.78 × 187,855
  4. Step 4: Simplify right side
    346,831x = 89,912,433,756.90
  5. Step 5: Solve for x
    x = 89,912,433,756.90/346,831
  6. Step 6: Final answer
    x = 259,239.90

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1.5x scale

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.