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Finding the Fourth Proportional to 642,476.99, 886,623.50 and 356,001.86

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Solution

The fourth proportional to 642,476.99, 886,623.50 and 356,001.86 is: 491,285.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,476.99 : 886,623.50 = 356,001.86 : x
  2. Step 2: Convert to fraction form
    642,476.99/886,623.50 = 356,001.86/x
  3. Step 3: Cross multiply
    642,476.99x = 886,623.50 × 356,001.86
  4. Step 4: Simplify right side
    642,476.99x = 315,639,615,119.71
  5. Step 5: Solve for x
    x = 315,639,615,119.71/642,476.99
  6. Step 6: Final answer
    x = 491,285.48

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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.