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Finding the Fourth Proportional to 642,419.62, 886,509.21 and 352,029.46

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Solution

The fourth proportional to 642,419.62, 886,509.21 and 352,029.46 is: 485,784.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,419.62 : 886,509.21 = 352,029.46 : x
  2. Step 2: Convert to fraction form
    642,419.62/886,509.21 = 352,029.46/x
  3. Step 3: Cross multiply
    642,419.62x = 886,509.21 × 352,029.46
  4. Step 4: Simplify right side
    642,419.62x = 312,077,358,481.33
  5. Step 5: Solve for x
    x = 312,077,358,481.33/642,419.62
  6. Step 6: Final answer
    x = 485,784.29

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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.