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Finding the Fourth Proportional to 642,604.28, 886,778.81 and 356,118.22

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Solution

The fourth proportional to 642,604.28, 886,778.81 and 356,118.22 is: 491,434.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,604.28 : 886,778.81 = 356,118.22 : x
  2. Step 2: Convert to fraction form
    642,604.28/886,778.81 = 356,118.22/x
  3. Step 3: Cross multiply
    642,604.28x = 886,778.81 × 356,118.22
  4. Step 4: Simplify right side
    642,604.28x = 315,798,090,024.27
  5. Step 5: Solve for x
    x = 315,798,090,024.27/642,604.28
  6. Step 6: Final answer
    x = 491,434.77

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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.