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Finding the Fourth Proportional to 316,449.34, 436,911.52 and 187,429.30

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Solution

The fourth proportional to 316,449.34, 436,911.52 and 187,429.30 is: 258,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,449.34 : 436,911.52 = 187,429.30 : x
  2. Step 2: Convert to fraction form
    316,449.34/436,911.52 = 187,429.30/x
  3. Step 3: Cross multiply
    316,449.34x = 436,911.52 × 187,429.30
  4. Step 4: Simplify right side
    316,449.34x = 81,890,020,355.54
  5. Step 5: Solve for x
    x = 81,890,020,355.54/316,449.34
  6. Step 6: Final answer
    x = 258,777.66

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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.