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Finding the Fourth Proportional to 807,222, 1,113,744.69 and 561,931.86

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Solution

The fourth proportional to 807,222, 1,113,744.69 and 561,931.86 is: 775,311.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,222 : 1,113,744.69 = 561,931.86 : x
  2. Step 2: Convert to fraction form
    807,222/1,113,744.69 = 561,931.86/x
  3. Step 3: Cross multiply
    807,222x = 1,113,744.69 × 561,931.86
  4. Step 4: Simplify right side
    807,222x = 625,848,625,216.82
  5. Step 5: Solve for x
    x = 625,848,625,216.82/807,222
  6. Step 6: Final answer
    x = 775,311.66

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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.