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Finding the Fourth Proportional to 258,450.32, 387,600.60 and 100,643.60

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Solution

The fourth proportional to 258,450.32, 387,600.60 and 100,643.60 is: 150,936.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,450.32 : 387,600.60 = 100,643.60 : x
  2. Step 2: Convert to fraction form
    258,450.32/387,600.60 = 100,643.60/x
  3. Step 3: Cross multiply
    258,450.32x = 387,600.60 × 100,643.60
  4. Step 4: Simplify right side
    258,450.32x = 39,009,519,746.16
  5. Step 5: Solve for x
    x = 39,009,519,746.16/258,450.32
  6. Step 6: Final answer
    x = 150,936.24

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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.