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Finding the Fourth Proportional to 639,419.26, 882,335.64 and 352,920.76

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Solution

The fourth proportional to 639,419.26, 882,335.64 and 352,920.76 is: 486,995.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,419.26 : 882,335.64 = 352,920.76 : x
  2. Step 2: Convert to fraction form
    639,419.26/882,335.64 = 352,920.76/x
  3. Step 3: Cross multiply
    639,419.26x = 882,335.64 × 352,920.76
  4. Step 4: Simplify right side
    639,419.26x = 311,394,564,643.89
  5. Step 5: Solve for x
    x = 311,394,564,643.89/639,419.26
  6. Step 6: Final answer
    x = 486,995.91

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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.