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Finding the Fourth Proportional to 639,010.89, 881,838 and 352,530.90

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Solution

The fourth proportional to 639,010.89, 881,838 and 352,530.90 is: 486,494.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,010.89 : 881,838 = 352,530.90 : x
  2. Step 2: Convert to fraction form
    639,010.89/881,838 = 352,530.90/x
  3. Step 3: Cross multiply
    639,010.89x = 881,838 × 352,530.90
  4. Step 4: Simplify right side
    639,010.89x = 310,875,143,794.20
  5. Step 5: Solve for x
    x = 310,875,143,794.20/639,010.89
  6. Step 6: Final answer
    x = 486,494.28

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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.