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Finding the Fourth Proportional to 722,781.16, 997,437.02 and 400,512.12

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Solution

The fourth proportional to 722,781.16, 997,437.02 and 400,512.12 is: 552,706.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,781.16 : 997,437.02 = 400,512.12 : x
  2. Step 2: Convert to fraction form
    722,781.16/997,437.02 = 400,512.12/x
  3. Step 3: Cross multiply
    722,781.16x = 997,437.02 × 400,512.12
  4. Step 4: Simplify right side
    722,781.16x = 399,485,615,446.68
  5. Step 5: Solve for x
    x = 399,485,615,446.68/722,781.16
  6. Step 6: Final answer
    x = 552,706.18

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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.