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Finding the Fourth Proportional to 458,396.77, 687,735.93 and 218,816.39

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Solution

The fourth proportional to 458,396.77, 687,735.93 and 218,816.39 is: 328,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,396.77 : 687,735.93 = 218,816.39 : x
  2. Step 2: Convert to fraction form
    458,396.77/687,735.93 = 218,816.39/x
  3. Step 3: Cross multiply
    458,396.77x = 687,735.93 × 218,816.39
  4. Step 4: Simplify right side
    458,396.77x = 150,487,893,475.89
  5. Step 5: Solve for x
    x = 150,487,893,475.89/458,396.77
  6. Step 6: Final answer
    x = 328,291.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.