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Finding the Fourth Proportional to 516,990.88, 713,392.86 and 287,510.92

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Solution

The fourth proportional to 516,990.88, 713,392.86 and 287,510.92 is: 396,734.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,990.88 : 713,392.86 = 287,510.92 : x
  2. Step 2: Convert to fraction form
    516,990.88/713,392.86 = 287,510.92/x
  3. Step 3: Cross multiply
    516,990.88x = 713,392.86 × 287,510.92
  4. Step 4: Simplify right side
    516,990.88x = 205,108,237,500.03
  5. Step 5: Solve for x
    x = 205,108,237,500.03/516,990.88
  6. Step 6: Final answer
    x = 396,734.73

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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.