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Finding the Fourth Proportional to 518,710.74, 715,999.41 and 303,920.34

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Solution

The fourth proportional to 518,710.74, 715,999.41 and 303,920.34 is: 419,514.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,710.74 : 715,999.41 = 303,920.34 : x
  2. Step 2: Convert to fraction form
    518,710.74/715,999.41 = 303,920.34/x
  3. Step 3: Cross multiply
    518,710.74x = 715,999.41 × 303,920.34
  4. Step 4: Simplify right side
    518,710.74x = 217,606,784,127.00
  5. Step 5: Solve for x
    x = 217,606,784,127.00/518,710.74
  6. Step 6: Final answer
    x = 419,514.71

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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.