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Finding the Fourth Proportional to 258,287.32, 387,493.44 and 89,783.32

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Solution

The fourth proportional to 258,287.32, 387,493.44 and 89,783.32 is: 134,696.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,287.32 : 387,493.44 = 89,783.32 : x
  2. Step 2: Convert to fraction form
    258,287.32/387,493.44 = 89,783.32/x
  3. Step 3: Cross multiply
    258,287.32x = 387,493.44 × 89,783.32
  4. Step 4: Simplify right side
    258,287.32x = 34,790,447,521.42
  5. Step 5: Solve for x
    x = 34,790,447,521.42/258,287.32
  6. Step 6: Final answer
    x = 134,696.69

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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.