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Finding the Fourth Proportional to 722,478.33, 997,052.92 and 400,188.39

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Solution

The fourth proportional to 722,478.33, 997,052.92 and 400,188.39 is: 552,278.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,478.33 : 997,052.92 = 400,188.39 : x
  2. Step 2: Convert to fraction form
    722,478.33/997,052.92 = 400,188.39/x
  3. Step 3: Cross multiply
    722,478.33x = 997,052.92 × 400,188.39
  4. Step 4: Simplify right side
    722,478.33x = 399,009,001,799.13
  5. Step 5: Solve for x
    x = 399,009,001,799.13/722,478.33
  6. Step 6: Final answer
    x = 552,278.16

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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.