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Finding the Fourth Proportional to 518,405.86, 715,415.25 and 303,525.82

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Solution

The fourth proportional to 518,405.86, 715,415.25 and 303,525.82 is: 418,874.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,405.86 : 715,415.25 = 303,525.82 : x
  2. Step 2: Convert to fraction form
    518,405.86/715,415.25 = 303,525.82/x
  3. Step 3: Cross multiply
    518,405.86x = 715,415.25 × 303,525.82
  4. Step 4: Simplify right side
    518,405.86x = 217,147,000,396.76
  5. Step 5: Solve for x
    x = 217,147,000,396.76/518,405.86
  6. Step 6: Final answer
    x = 418,874.51

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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.