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Finding the Fourth Proportional to 518,777.64, 715,913.13 and 280,313.64

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Solution

The fourth proportional to 518,777.64, 715,913.13 and 280,313.64 is: 386,832.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,777.64 : 715,913.13 = 280,313.64 : x
  2. Step 2: Convert to fraction form
    518,777.64/715,913.13 = 280,313.64/x
  3. Step 3: Cross multiply
    518,777.64x = 715,913.13 × 280,313.64
  4. Step 4: Simplify right side
    518,777.64x = 200,680,215,394.09
  5. Step 5: Solve for x
    x = 200,680,215,394.09/518,777.64
  6. Step 6: Final answer
    x = 386,832.82

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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.