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Finding the Fourth Proportional to 258,420.20, 387,342.30 and 100,596.20

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Solution

The fourth proportional to 258,420.20, 387,342.30 and 100,596.20 is: 150,782.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,420.20 : 387,342.30 = 100,596.20 : x
  2. Step 2: Convert to fraction form
    258,420.20/387,342.30 = 100,596.20/x
  3. Step 3: Cross multiply
    258,420.20x = 387,342.30 × 100,596.20
  4. Step 4: Simplify right side
    258,420.20x = 38,965,163,479.26
  5. Step 5: Solve for x
    x = 38,965,163,479.26/258,420.20
  6. Step 6: Final answer
    x = 150,782.19

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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.