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Finding the Fourth Proportional to 220,225.78, 330,360.47 and 70,428.43

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Solution

The fourth proportional to 220,225.78, 330,360.47 and 70,428.43 is: 105,649.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,225.78 : 330,360.47 = 70,428.43 : x
  2. Step 2: Convert to fraction form
    220,225.78/330,360.47 = 70,428.43/x
  3. Step 3: Cross multiply
    220,225.78x = 330,360.47 × 70,428.43
  4. Step 4: Simplify right side
    220,225.78x = 23,266,767,232.22
  5. Step 5: Solve for x
    x = 23,266,767,232.22/220,225.78
  6. Step 6: Final answer
    x = 105,649.61

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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.