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Finding the Fourth Proportional to 1,188,553.40, 1,784,579.70 and 922,614.20

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Solution

The fourth proportional to 1,188,553.40, 1,784,579.70 and 922,614.20 is: 1,385,279.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,553.40 : 1,784,579.70 = 922,614.20 : x
  2. Step 2: Convert to fraction form
    1,188,553.40/1,784,579.70 = 922,614.20/x
  3. Step 3: Cross multiply
    1,188,553.40x = 1,784,579.70 × 922,614.20
  4. Step 4: Simplify right side
    1,188,553.40x = 1,646,478,572,251.74
  5. Step 5: Solve for x
    x = 1,646,478,572,251.74/1,188,553.40
  6. Step 6: Final answer
    x = 1,385,279.43

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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.