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Finding the Fourth Proportional to 1,321,502.50, 1,823,673.45 and 717,890.50

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Solution

The fourth proportional to 1,321,502.50, 1,823,673.45 and 717,890.50 is: 990,688.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,502.50 : 1,823,673.45 = 717,890.50 : x
  2. Step 2: Convert to fraction form
    1,321,502.50/1,823,673.45 = 717,890.50/x
  3. Step 3: Cross multiply
    1,321,502.50x = 1,823,673.45 × 717,890.50
  4. Step 4: Simplify right side
    1,321,502.50x = 1,309,197,844,857.22
  5. Step 5: Solve for x
    x = 1,309,197,844,857.22/1,321,502.50
  6. Step 6: Final answer
    x = 990,688.89

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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.