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Finding the Fourth Proportional to 722,165.92, 996,599.46 and 399,875.40

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Solution

The fourth proportional to 722,165.92, 996,599.46 and 399,875.40 is: 551,833.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,165.92 : 996,599.46 = 399,875.40 : x
  2. Step 2: Convert to fraction form
    722,165.92/996,599.46 = 399,875.40/x
  3. Step 3: Cross multiply
    722,165.92x = 996,599.46 × 399,875.40
  4. Step 4: Simplify right side
    722,165.92x = 398,515,607,707.28
  5. Step 5: Solve for x
    x = 398,515,607,707.28/722,165.92
  6. Step 6: Final answer
    x = 551,833.86

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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.