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Finding the Fourth Proportional to 638,976.88, 881,790.98 and 352,496.89

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Solution

The fourth proportional to 638,976.88, 881,790.98 and 352,496.89 is: 486,447.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,976.88 : 881,790.98 = 352,496.89 : x
  2. Step 2: Convert to fraction form
    638,976.88/881,790.98 = 352,496.89/x
  3. Step 3: Cross multiply
    638,976.88x = 881,790.98 × 352,496.89
  4. Step 4: Simplify right side
    638,976.88x = 310,828,578,080.05
  5. Step 5: Solve for x
    x = 310,828,578,080.05/638,976.88
  6. Step 6: Final answer
    x = 486,447.30

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Double scale
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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.