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Finding the Fourth Proportional to 561,817.55, 775,311.46 and 307,168.74

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Solution

The fourth proportional to 561,817.55, 775,311.46 and 307,168.74 is: 423,894.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,817.55 : 775,311.46 = 307,168.74 : x
  2. Step 2: Convert to fraction form
    561,817.55/775,311.46 = 307,168.74/x
  3. Step 3: Cross multiply
    561,817.55x = 775,311.46 × 307,168.74
  4. Step 4: Simplify right side
    561,817.55x = 238,151,443,507.84
  5. Step 5: Solve for x
    x = 238,151,443,507.84/561,817.55
  6. Step 6: Final answer
    x = 423,894.63

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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.