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Finding the Fourth Proportional to 561,771.88, 775,247.86 and 307,123

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Solution

The fourth proportional to 561,771.88, 775,247.86 and 307,123 is: 423,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,771.88 : 775,247.86 = 307,123 : x
  2. Step 2: Convert to fraction form
    561,771.88/775,247.86 = 307,123/x
  3. Step 3: Cross multiply
    561,771.88x = 775,247.86 × 307,123
  4. Step 4: Simplify right side
    561,771.88x = 238,096,448,506.78
  5. Step 5: Solve for x
    x = 238,096,448,506.78/561,771.88
  6. Step 6: Final answer
    x = 423,831.20

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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.