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Finding the Fourth Proportional to 722,088.69, 996,513.54 and 399,798.79

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Solution

The fourth proportional to 722,088.69, 996,513.54 and 399,798.79 is: 551,739.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,088.69 : 996,513.54 = 399,798.79 : x
  2. Step 2: Convert to fraction form
    722,088.69/996,513.54 = 399,798.79/x
  3. Step 3: Cross multiply
    722,088.69x = 996,513.54 × 399,798.79
  4. Step 4: Simplify right side
    722,088.69x = 398,404,909,125.48
  5. Step 5: Solve for x
    x = 398,404,909,125.48/722,088.69
  6. Step 6: Final answer
    x = 551,739.58

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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.