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Finding the Fourth Proportional to 518,809.05, 715,847.63 and 314,967.29

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Solution

The fourth proportional to 518,809.05, 715,847.63 and 314,967.29 is: 434,588.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,809.05 : 715,847.63 = 314,967.29 : x
  2. Step 2: Convert to fraction form
    518,809.05/715,847.63 = 314,967.29/x
  3. Step 3: Cross multiply
    518,809.05x = 715,847.63 × 314,967.29
  4. Step 4: Simplify right side
    518,809.05x = 225,468,582,919.95
  5. Step 5: Solve for x
    x = 225,468,582,919.95/518,809.05
  6. Step 6: Final answer
    x = 434,588.76

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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.