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Finding the Fourth Proportional to 638,604.79, 881,229.54 and 352,118.77

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Solution

The fourth proportional to 638,604.79, 881,229.54 and 352,118.77 is: 485,899.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,604.79 : 881,229.54 = 352,118.77 : x
  2. Step 2: Convert to fraction form
    638,604.79/881,229.54 = 352,118.77/x
  3. Step 3: Cross multiply
    638,604.79x = 881,229.54 × 352,118.77
  4. Step 4: Simplify right side
    638,604.79x = 310,297,461,712.47
  5. Step 5: Solve for x
    x = 310,297,461,712.47/638,604.79
  6. Step 6: Final answer
    x = 485,899.05

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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.