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Finding the Fourth Proportional to 258,842.34, 387,832.68 and 90,269.70

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Solution

The fourth proportional to 258,842.34, 387,832.68 and 90,269.70 is: 135,254.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,842.34 : 387,832.68 = 90,269.70 : x
  2. Step 2: Convert to fraction form
    258,842.34/387,832.68 = 90,269.70/x
  3. Step 3: Cross multiply
    258,842.34x = 387,832.68 × 90,269.70
  4. Step 4: Simplify right side
    258,842.34x = 35,009,539,673.80
  5. Step 5: Solve for x
    x = 35,009,539,673.80/258,842.34
  6. Step 6: Final answer
    x = 135,254.30

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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.