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Finding the Fourth Proportional to 316,505.40, 436,782.60 and 173,263.02

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Solution

The fourth proportional to 316,505.40, 436,782.60 and 173,263.02 is: 239,105.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,505.40 : 436,782.60 = 173,263.02 : x
  2. Step 2: Convert to fraction form
    316,505.40/436,782.60 = 173,263.02/x
  3. Step 3: Cross multiply
    316,505.40x = 436,782.60 × 173,263.02
  4. Step 4: Simplify right side
    316,505.40x = 75,678,272,359.45
  5. Step 5: Solve for x
    x = 75,678,272,359.45/316,505.40
  6. Step 6: Final answer
    x = 239,105.79

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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.