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Finding the Fourth Proportional to 508,447.87, 701,986.76 and 315,060.79

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Solution

The fourth proportional to 508,447.87, 701,986.76 and 315,060.79 is: 434,987.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,447.87 : 701,986.76 = 315,060.79 : x
  2. Step 2: Convert to fraction form
    508,447.87/701,986.76 = 315,060.79/x
  3. Step 3: Cross multiply
    508,447.87x = 701,986.76 × 315,060.79
  4. Step 4: Simplify right side
    508,447.87x = 221,168,503,175.14
  5. Step 5: Solve for x
    x = 221,168,503,175.14/508,447.87
  6. Step 6: Final answer
    x = 434,987.57

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Double scale
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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.