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Finding the Fourth Proportional to 518,686.72, 715,856.46 and 314,705.22

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Solution

The fourth proportional to 518,686.72, 715,856.46 and 314,705.22 is: 434,334.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,686.72 : 715,856.46 = 314,705.22 : x
  2. Step 2: Convert to fraction form
    518,686.72/715,856.46 = 314,705.22/x
  3. Step 3: Cross multiply
    518,686.72x = 715,856.46 × 314,705.22
  4. Step 4: Simplify right side
    518,686.72x = 225,283,764,732.72
  5. Step 5: Solve for x
    x = 225,283,764,732.72/518,686.72
  6. Step 6: Final answer
    x = 434,334.94

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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.