Home / 686,518.65-1,028,398.95-386,549.73

Finding the Fourth Proportional to 686,518.65, 1,028,398.95 and 386,549.73

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Solution

The fourth proportional to 686,518.65, 1,028,398.95 and 386,549.73 is: 579,048.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,518.65 : 1,028,398.95 = 386,549.73 : x
  2. Step 2: Convert to fraction form
    686,518.65/1,028,398.95 = 386,549.73/x
  3. Step 3: Cross multiply
    686,518.65x = 1,028,398.95 × 386,549.73
  4. Step 4: Simplify right side
    686,518.65x = 397,527,336,454.78
  5. Step 5: Solve for x
    x = 397,527,336,454.78/686,518.65
  6. Step 6: Final answer
    x = 579,048.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.