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Finding the Fourth Proportional to 642,588.35, 886,807.22 and 356,102.29

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Solution

The fourth proportional to 642,588.35, 886,807.22 and 356,102.29 is: 491,440.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,588.35 : 886,807.22 = 356,102.29 : x
  2. Step 2: Convert to fraction form
    642,588.35/886,807.22 = 356,102.29/x
  3. Step 3: Cross multiply
    642,588.35x = 886,807.22 × 356,102.29
  4. Step 4: Simplify right side
    642,588.35x = 315,794,077,396.50
  5. Step 5: Solve for x
    x = 315,794,077,396.50/642,588.35
  6. Step 6: Final answer
    x = 491,440.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.