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Finding the Fourth Proportional to 485,490.29, 669,663.92 and 322,143.26

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Solution

The fourth proportional to 485,490.29, 669,663.92 and 322,143.26 is: 444,350.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,490.29 : 669,663.92 = 322,143.26 : x
  2. Step 2: Convert to fraction form
    485,490.29/669,663.92 = 322,143.26/x
  3. Step 3: Cross multiply
    485,490.29x = 669,663.92 × 322,143.26
  4. Step 4: Simplify right side
    485,490.29x = 215,727,713,334.14
  5. Step 5: Solve for x
    x = 215,727,713,334.14/485,490.29
  6. Step 6: Final answer
    x = 444,350.22

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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.