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Finding the Fourth Proportional to 611,392.80, 916,724.70 and 374,905.20

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Solution

The fourth proportional to 611,392.80, 916,724.70 and 374,905.20 is: 562,134.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,392.80 : 916,724.70 = 374,905.20 : x
  2. Step 2: Convert to fraction form
    611,392.80/916,724.70 = 374,905.20/x
  3. Step 3: Cross multiply
    611,392.80x = 916,724.70 × 374,905.20
  4. Step 4: Simplify right side
    611,392.80x = 343,684,856,998.44
  5. Step 5: Solve for x
    x = 343,684,856,998.44/611,392.80
  6. Step 6: Final answer
    x = 562,134.29

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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.