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Finding the Fourth Proportional to 518,353.92, 715,241.68 and 288,860.91

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Solution

The fourth proportional to 518,353.92, 715,241.68 and 288,860.91 is: 398,579.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,353.92 : 715,241.68 = 288,860.91 : x
  2. Step 2: Convert to fraction form
    518,353.92/715,241.68 = 288,860.91/x
  3. Step 3: Cross multiply
    518,353.92x = 715,241.68 × 288,860.91
  4. Step 4: Simplify right side
    518,353.92x = 206,605,362,554.73
  5. Step 5: Solve for x
    x = 206,605,362,554.73/518,353.92
  6. Step 6: Final answer
    x = 398,579.72

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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.