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Finding the Fourth Proportional to 518,690.64, 715,850.04 and 300,947.28

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Solution

The fourth proportional to 518,690.64, 715,850.04 and 300,947.28 is: 415,340.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,690.64 : 715,850.04 = 300,947.28 : x
  2. Step 2: Convert to fraction form
    518,690.64/715,850.04 = 300,947.28/x
  3. Step 3: Cross multiply
    518,690.64x = 715,850.04 × 300,947.28
  4. Step 4: Simplify right side
    518,690.64x = 215,433,122,425.89
  5. Step 5: Solve for x
    x = 215,433,122,425.89/518,690.64
  6. Step 6: Final answer
    x = 415,340.29

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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.