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Finding the Fourth Proportional to 316,225.80, 436,391.45 and 172,985.80

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Solution

The fourth proportional to 316,225.80, 436,391.45 and 172,985.80 is: 238,720.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,225.80 : 436,391.45 = 172,985.80 : x
  2. Step 2: Convert to fraction form
    316,225.80/436,391.45 = 172,985.80/x
  3. Step 3: Cross multiply
    316,225.80x = 436,391.45 × 172,985.80
  4. Step 4: Simplify right side
    316,225.80x = 75,489,524,091.41
  5. Step 5: Solve for x
    x = 75,489,524,091.41/316,225.80
  6. Step 6: Final answer
    x = 238,720.32

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1.5x scale

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.