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Finding the Fourth Proportional to 518,789.18, 715,976.34 and 314,892.34

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Solution

The fourth proportional to 518,789.18, 715,976.34 and 314,892.34 is: 434,580.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,789.18 : 715,976.34 = 314,892.34 : x
  2. Step 2: Convert to fraction form
    518,789.18/715,976.34 = 314,892.34/x
  3. Step 3: Cross multiply
    518,789.18x = 715,976.34 × 314,892.34
  4. Step 4: Simplify right side
    518,789.18x = 225,455,465,087.24
  5. Step 5: Solve for x
    x = 225,455,465,087.24/518,789.18
  6. Step 6: Final answer
    x = 434,580.12

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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.