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Finding the Fourth Proportional to 316,430.94, 436,657.94 and 173,163.30

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Solution

The fourth proportional to 316,430.94, 436,657.94 and 173,163.30 is: 238,956.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,430.94 : 436,657.94 = 173,163.30 : x
  2. Step 2: Convert to fraction form
    316,430.94/436,657.94 = 173,163.30/x
  3. Step 3: Cross multiply
    316,430.94x = 436,657.94 × 173,163.30
  4. Step 4: Simplify right side
    316,430.94x = 75,613,128,995.79
  5. Step 5: Solve for x
    x = 75,613,128,995.79/316,430.94
  6. Step 6: Final answer
    x = 238,956.18

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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.