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Finding the Fourth Proportional to 815,720.40, 1,223,753.40 and 247,054.80

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Solution

The fourth proportional to 815,720.40, 1,223,753.40 and 247,054.80 is: 370,634.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,720.40 : 1,223,753.40 = 247,054.80 : x
  2. Step 2: Convert to fraction form
    815,720.40/1,223,753.40 = 247,054.80/x
  3. Step 3: Cross multiply
    815,720.40x = 1,223,753.40 × 247,054.80
  4. Step 4: Simplify right side
    815,720.40x = 302,334,151,486.32
  5. Step 5: Solve for x
    x = 302,334,151,486.32/815,720.40
  6. Step 6: Final answer
    x = 370,634.54

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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.