Home / 258,895.13-388,435.85-90,440.24

Finding the Fourth Proportional to 258,895.13, 388,435.85 and 90,440.24

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Solution

The fourth proportional to 258,895.13, 388,435.85 and 90,440.24 is: 135,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,895.13 : 388,435.85 = 90,440.24 : x
  2. Step 2: Convert to fraction form
    258,895.13/388,435.85 = 90,440.24/x
  3. Step 3: Cross multiply
    258,895.13x = 388,435.85 × 90,440.24
  4. Step 4: Simplify right side
    258,895.13x = 35,130,231,046.40
  5. Step 5: Solve for x
    x = 35,130,231,046.40/258,895.13
  6. Step 6: Final answer
    x = 135,692.90

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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.