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Finding the Third Proportional to 356,776 and 553,617

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Solution

The third proportional to 356,776 and 553,617 is: 859,059.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,776 : 553,617 = 553,617 : x
  2. Step 2: Convert to fraction form
    356,776/553,617 = 553,617/x
  3. Step 3: Cross multiply
    356,776x = 553,617 × 553,617
  4. Step 4: Simplify right side
    356,776x = 306,491,782,689
  5. Step 5: Solve for x
    x = 306,491,782,689/356,776
  6. Step 6: Final answer
    x = 859,059.42

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.