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Finding the Fourth Proportional to 316,384.90, 436,605.33 and 173,142.07

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Solution

The fourth proportional to 316,384.90, 436,605.33 and 173,142.07 is: 238,932.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,384.90 : 436,605.33 = 173,142.07 : x
  2. Step 2: Convert to fraction form
    316,384.90/436,605.33 = 173,142.07/x
  3. Step 3: Cross multiply
    316,384.90x = 436,605.33 × 173,142.07
  4. Step 4: Simplify right side
    316,384.90x = 75,594,750,609.23
  5. Step 5: Solve for x
    x = 75,594,750,609.23/316,384.90
  6. Step 6: Final answer
    x = 238,932.87

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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.