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Finding the Fourth Proportional to 722,590.80, 997,236.56 and 400,401.96

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Solution

The fourth proportional to 722,590.80, 997,236.56 and 400,401.96 is: 552,588.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,590.80 : 997,236.56 = 400,401.96 : x
  2. Step 2: Convert to fraction form
    722,590.80/997,236.56 = 400,401.96/x
  3. Step 3: Cross multiply
    722,590.80x = 997,236.56 × 400,401.96
  4. Step 4: Simplify right side
    722,590.80x = 399,295,473,207.66
  5. Step 5: Solve for x
    x = 399,295,473,207.66/722,590.80
  6. Step 6: Final answer
    x = 552,588.65

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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.