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Finding the Fourth Proportional to 642,384.09, 886,497.63 and 352,003.95

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Solution

The fourth proportional to 642,384.09, 886,497.63 and 352,003.95 is: 485,769.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,384.09 : 886,497.63 = 352,003.95 : x
  2. Step 2: Convert to fraction form
    642,384.09/886,497.63 = 352,003.95/x
  3. Step 3: Cross multiply
    642,384.09x = 886,497.63 × 352,003.95
  4. Step 4: Simplify right side
    642,384.09x = 312,050,667,425.64
  5. Step 5: Solve for x
    x = 312,050,667,425.64/642,384.09
  6. Step 6: Final answer
    x = 485,769.61

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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.