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Finding the Fourth Proportional to 642,470.45, 886,610.25 and 352,035.86

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Solution

The fourth proportional to 642,470.45, 886,610.25 and 352,035.86 is: 485,810.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,470.45 : 886,610.25 = 352,035.86 : x
  2. Step 2: Convert to fraction form
    642,470.45/886,610.25 = 352,035.86/x
  3. Step 3: Cross multiply
    642,470.45x = 886,610.25 × 352,035.86
  4. Step 4: Simplify right side
    642,470.45x = 312,118,597,410.51
  5. Step 5: Solve for x
    x = 312,118,597,410.51/642,470.45
  6. Step 6: Final answer
    x = 485,810.05

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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.