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Finding the Fourth Proportional to 254,014.21, 380,782.90 and 85,416.63

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Solution

The fourth proportional to 254,014.21, 380,782.90 and 85,416.63 is: 128,044.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,014.21 : 380,782.90 = 85,416.63 : x
  2. Step 2: Convert to fraction form
    254,014.21/380,782.90 = 85,416.63/x
  3. Step 3: Cross multiply
    254,014.21x = 380,782.90 × 85,416.63
  4. Step 4: Simplify right side
    254,014.21x = 32,525,192,079.63
  5. Step 5: Solve for x
    x = 32,525,192,079.63/254,014.21
  6. Step 6: Final answer
    x = 128,044.77

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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.