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Finding the Fourth Proportional to 518,619.48, 715,742.12 and 314,722.29

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Solution

The fourth proportional to 518,619.48, 715,742.12 and 314,722.29 is: 434,345.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,619.48 : 715,742.12 = 314,722.29 : x
  2. Step 2: Convert to fraction form
    518,619.48/715,742.12 = 314,722.29/x
  3. Step 3: Cross multiply
    518,619.48x = 715,742.12 × 314,722.29
  4. Step 4: Simplify right side
    518,619.48x = 225,260,002,526.69
  5. Step 5: Solve for x
    x = 225,260,002,526.69/518,619.48
  6. Step 6: Final answer
    x = 434,345.44

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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.