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Finding the Fourth Proportional to 722,190.52, 996,595.50 and 399,875

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Solution

The fourth proportional to 722,190.52, 996,595.50 and 399,875 is: 551,812.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,190.52 : 996,595.50 = 399,875 : x
  2. Step 2: Convert to fraction form
    722,190.52/996,595.50 = 399,875/x
  3. Step 3: Cross multiply
    722,190.52x = 996,595.50 × 399,875
  4. Step 4: Simplify right side
    722,190.52x = 398,513,625,562.50
  5. Step 5: Solve for x
    x = 398,513,625,562.50/722,190.52
  6. Step 6: Final answer
    x = 551,812.32

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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.