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Finding the Fourth Proportional to 316,575.21, 436,851.05 and 173,312.13

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Solution

The fourth proportional to 316,575.21, 436,851.05 and 173,312.13 is: 239,158.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,575.21 : 436,851.05 = 173,312.13 : x
  2. Step 2: Convert to fraction form
    316,575.21/436,851.05 = 173,312.13/x
  3. Step 3: Cross multiply
    316,575.21x = 436,851.05 × 173,312.13
  4. Step 4: Simplify right side
    316,575.21x = 75,711,585,101.68
  5. Step 5: Solve for x
    x = 75,711,585,101.68/316,575.21
  6. Step 6: Final answer
    x = 239,158.29

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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.