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Finding the Fourth Proportional to 501,318.40, 691,814.64 and 274,964.80

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Solution

The fourth proportional to 501,318.40, 691,814.64 and 274,964.80 is: 379,448.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,318.40 : 691,814.64 = 274,964.80 : x
  2. Step 2: Convert to fraction form
    501,318.40/691,814.64 = 274,964.80/x
  3. Step 3: Cross multiply
    501,318.40x = 691,814.64 × 274,964.80
  4. Step 4: Simplify right side
    501,318.40x = 190,224,674,124.67
  5. Step 5: Solve for x
    x = 190,224,674,124.67/501,318.40
  6. Step 6: Final answer
    x = 379,448.82

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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.