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Finding the Fourth Proportional to 518,621.82, 715,695.45 and 300,874.53

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Solution

The fourth proportional to 518,621.82, 715,695.45 and 300,874.53 is: 415,205.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,621.82 : 715,695.45 = 300,874.53 : x
  2. Step 2: Convert to fraction form
    518,621.82/715,695.45 = 300,874.53/x
  3. Step 3: Cross multiply
    518,621.82x = 715,695.45 × 300,874.53
  4. Step 4: Simplify right side
    518,621.82x = 215,334,533,697.47
  5. Step 5: Solve for x
    x = 215,334,533,697.47/518,621.82
  6. Step 6: Final answer
    x = 415,205.31

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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.