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Finding the Fourth Proportional to 518,327.08, 715,293.30 and 300,578.20

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Solution

The fourth proportional to 518,327.08, 715,293.30 and 300,578.20 is: 414,799.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,327.08 : 715,293.30 = 300,578.20 : x
  2. Step 2: Convert to fraction form
    518,327.08/715,293.30 = 300,578.20/x
  3. Step 3: Cross multiply
    518,327.08x = 715,293.30 × 300,578.20
  4. Step 4: Simplify right side
    518,327.08x = 215,001,572,586.06
  5. Step 5: Solve for x
    x = 215,001,572,586.06/518,327.08
  6. Step 6: Final answer
    x = 414,799.03

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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.