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Finding the Fourth Proportional to 316,530.40, 436,817.16 and 173,288.08

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Solution

The fourth proportional to 316,530.40, 436,817.16 and 173,288.08 is: 239,140.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,530.40 : 436,817.16 = 173,288.08 : x
  2. Step 2: Convert to fraction form
    316,530.40/436,817.16 = 173,288.08/x
  3. Step 3: Cross multiply
    316,530.40x = 436,817.16 × 173,288.08
  4. Step 4: Simplify right side
    316,530.40x = 75,695,206,967.45
  5. Step 5: Solve for x
    x = 75,695,206,967.45/316,530.40
  6. Step 6: Final answer
    x = 239,140.40

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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.