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Finding the Fourth Proportional to 638,672.26, 881,355.45 and 352,218.82

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Solution

The fourth proportional to 638,672.26, 881,355.45 and 352,218.82 is: 486,055.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,672.26 : 881,355.45 = 352,218.82 : x
  2. Step 2: Convert to fraction form
    638,672.26/881,355.45 = 352,218.82/x
  3. Step 3: Cross multiply
    638,672.26x = 881,355.45 × 352,218.82
  4. Step 4: Simplify right side
    638,672.26x = 310,429,976,599.57
  5. Step 5: Solve for x
    x = 310,429,976,599.57/638,672.26
  6. Step 6: Final answer
    x = 486,055.21

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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.