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Finding the Fourth Proportional to 722,487.80, 997,065.98 and 400,197.86

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Solution

The fourth proportional to 722,487.80, 997,065.98 and 400,197.86 is: 552,291.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,487.80 : 997,065.98 = 400,197.86 : x
  2. Step 2: Convert to fraction form
    722,487.80/997,065.98 = 400,197.86/x
  3. Step 3: Cross multiply
    722,487.80x = 997,065.98 × 400,197.86
  4. Step 4: Simplify right side
    722,487.80x = 399,023,671,474.80
  5. Step 5: Solve for x
    x = 399,023,671,474.80/722,487.80
  6. Step 6: Final answer
    x = 552,291.22

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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.