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Finding the Fourth Proportional to 722,988.20, 997,698.12 and 400,728.26

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Solution

The fourth proportional to 722,988.20, 997,698.12 and 400,728.26 is: 552,990.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,988.20 : 997,698.12 = 400,728.26 : x
  2. Step 2: Convert to fraction form
    722,988.20/997,698.12 = 400,728.26/x
  3. Step 3: Cross multiply
    722,988.20x = 997,698.12 × 400,728.26
  4. Step 4: Simplify right side
    722,988.20x = 399,805,831,632.87
  5. Step 5: Solve for x
    x = 399,805,831,632.87/722,988.20
  6. Step 6: Final answer
    x = 552,990.81

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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.