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Finding the Fourth Proportional to 518,818.56, 715,860.72 and 314,976.80

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Solution

The fourth proportional to 518,818.56, 715,860.72 and 314,976.80 is: 434,601.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,818.56 : 715,860.72 = 314,976.80 : x
  2. Step 2: Convert to fraction form
    518,818.56/715,860.72 = 314,976.80/x
  3. Step 3: Cross multiply
    518,818.56x = 715,860.72 × 314,976.80
  4. Step 4: Simplify right side
    518,818.56x = 225,479,518,831.30
  5. Step 5: Solve for x
    x = 225,479,518,831.30/518,818.56
  6. Step 6: Final answer
    x = 434,601.87

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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.