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Finding the Fourth Proportional to 316,081.12, 436,060.56 and 207,155.68

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Solution

The fourth proportional to 316,081.12, 436,060.56 and 207,155.68 is: 285,788.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,081.12 : 436,060.56 = 207,155.68 : x
  2. Step 2: Convert to fraction form
    316,081.12/436,060.56 = 207,155.68/x
  3. Step 3: Cross multiply
    316,081.12x = 436,060.56 × 207,155.68
  4. Step 4: Simplify right side
    316,081.12x = 90,332,421,827.98
  5. Step 5: Solve for x
    x = 90,332,421,827.98/316,081.12
  6. Step 6: Final answer
    x = 285,788.73

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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.