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Finding the Fourth Proportional to 722,989.60, 997,725.72 and 400,720.48

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Solution

The fourth proportional to 722,989.60, 997,725.72 and 400,720.48 is: 552,994.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,989.60 : 997,725.72 = 400,720.48 : x
  2. Step 2: Convert to fraction form
    722,989.60/997,725.72 = 400,720.48/x
  3. Step 3: Cross multiply
    722,989.60x = 997,725.72 × 400,720.48
  4. Step 4: Simplify right side
    722,989.60x = 399,809,129,426.75
  5. Step 5: Solve for x
    x = 399,809,129,426.75/722,989.60
  6. Step 6: Final answer
    x = 552,994.30

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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.