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Finding the Fourth Proportional to 454,403.80, 681,605.70 and 138,858

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Solution

The fourth proportional to 454,403.80, 681,605.70 and 138,858 is: 208,287.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,403.80 : 681,605.70 = 138,858 : x
  2. Step 2: Convert to fraction form
    454,403.80/681,605.70 = 138,858/x
  3. Step 3: Cross multiply
    454,403.80x = 681,605.70 × 138,858
  4. Step 4: Simplify right side
    454,403.80x = 94,646,404,290.60
  5. Step 5: Solve for x
    x = 94,646,404,290.60/454,403.80
  6. Step 6: Final answer
    x = 208,287.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.