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Finding the Fourth Proportional to 258,442.32, 387,588.60 and 100,635.60

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Solution

The fourth proportional to 258,442.32, 387,588.60 and 100,635.60 is: 150,924.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,442.32 : 387,588.60 = 100,635.60 : x
  2. Step 2: Convert to fraction form
    258,442.32/387,588.60 = 100,635.60/x
  3. Step 3: Cross multiply
    258,442.32x = 387,588.60 × 100,635.60
  4. Step 4: Simplify right side
    258,442.32x = 39,005,211,314.16
  5. Step 5: Solve for x
    x = 39,005,211,314.16/258,442.32
  6. Step 6: Final answer
    x = 150,924.24

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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.