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Finding the Fourth Proportional to 438,985.72, 605,791.44 and 245,392.48

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Solution

The fourth proportional to 438,985.72, 605,791.44 and 245,392.48 is: 338,636.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,985.72 : 605,791.44 = 245,392.48 : x
  2. Step 2: Convert to fraction form
    438,985.72/605,791.44 = 245,392.48/x
  3. Step 3: Cross multiply
    438,985.72x = 605,791.44 × 245,392.48
  4. Step 4: Simplify right side
    438,985.72x = 148,656,663,824.37
  5. Step 5: Solve for x
    x = 148,656,663,824.37/438,985.72
  6. Step 6: Final answer
    x = 338,636.67

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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.