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Finding the Fourth Proportional to 383,781.40, 575,715.30 and 117,539.80

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Solution

The fourth proportional to 383,781.40, 575,715.30 and 117,539.80 is: 176,322.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,781.40 : 575,715.30 = 117,539.80 : x
  2. Step 2: Convert to fraction form
    383,781.40/575,715.30 = 117,539.80/x
  3. Step 3: Cross multiply
    383,781.40x = 575,715.30 × 117,539.80
  4. Step 4: Simplify right side
    383,781.40x = 67,669,461,218.94
  5. Step 5: Solve for x
    x = 67,669,461,218.94/383,781.40
  6. Step 6: Final answer
    x = 176,322.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.