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Finding the Fourth Proportional to 722,088.62, 996,513.44 and 399,798.72

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Solution

The fourth proportional to 722,088.62, 996,513.44 and 399,798.72 is: 551,739.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,088.62 : 996,513.44 = 399,798.72 : x
  2. Step 2: Convert to fraction form
    722,088.62/996,513.44 = 399,798.72/x
  3. Step 3: Cross multiply
    722,088.62x = 996,513.44 × 399,798.72
  4. Step 4: Simplify right side
    722,088.62x = 398,404,798,024.67
  5. Step 5: Solve for x
    x = 398,404,798,024.67/722,088.62
  6. Step 6: Final answer
    x = 551,739.47

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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.