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Finding the Fourth Proportional to 642,521.72, 886,677.58 and 356,041.57

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Solution

The fourth proportional to 642,521.72, 886,677.58 and 356,041.57 is: 491,336.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,521.72 : 886,677.58 = 356,041.57 : x
  2. Step 2: Convert to fraction form
    642,521.72/886,677.58 = 356,041.57/x
  3. Step 3: Cross multiply
    642,521.72x = 886,677.58 × 356,041.57
  4. Step 4: Simplify right side
    642,521.72x = 315,694,078,993.59
  5. Step 5: Solve for x
    x = 315,694,078,993.59/642,521.72
  6. Step 6: Final answer
    x = 491,336.05

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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.