Home / 258,977.64-388,372.50-90,450.76

Finding the Fourth Proportional to 258,977.64, 388,372.50 and 90,450.76

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Solution

The fourth proportional to 258,977.64, 388,372.50 and 90,450.76 is: 135,643.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,977.64 : 388,372.50 = 90,450.76 : x
  2. Step 2: Convert to fraction form
    258,977.64/388,372.50 = 90,450.76/x
  3. Step 3: Cross multiply
    258,977.64x = 388,372.50 × 90,450.76
  4. Step 4: Simplify right side
    258,977.64x = 35,128,587,788.10
  5. Step 5: Solve for x
    x = 35,128,587,788.10/258,977.64
  6. Step 6: Final answer
    x = 135,643.32

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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.