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Finding the Fourth Proportional to 722,208.10, 996,646.54 and 399,918.20

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Solution

The fourth proportional to 722,208.10, 996,646.54 and 399,918.20 is: 551,886.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,208.10 : 996,646.54 = 399,918.20 : x
  2. Step 2: Convert to fraction form
    722,208.10/996,646.54 = 399,918.20/x
  3. Step 3: Cross multiply
    722,208.10x = 996,646.54 × 399,918.20
  4. Step 4: Simplify right side
    722,208.10x = 398,577,090,313.03
  5. Step 5: Solve for x
    x = 398,577,090,313.03/722,208.10
  6. Step 6: Final answer
    x = 551,886.76

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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.