Home / 642,421.12-886,511.28-352,030.96

Finding the Fourth Proportional to 642,421.12, 886,511.28 and 352,030.96

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Solution

The fourth proportional to 642,421.12, 886,511.28 and 352,030.96 is: 485,786.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,421.12 : 886,511.28 = 352,030.96 : x
  2. Step 2: Convert to fraction form
    642,421.12/886,511.28 = 352,030.96/x
  3. Step 3: Cross multiply
    642,421.12x = 886,511.28 × 352,030.96
  4. Step 4: Simplify right side
    642,421.12x = 312,079,416,949.23
  5. Step 5: Solve for x
    x = 312,079,416,949.23/642,421.12
  6. Step 6: Final answer
    x = 485,786.36

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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.