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Finding the Fourth Proportional to 319,392.48, 440,743.56 and 198,530.67

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Solution

The fourth proportional to 319,392.48, 440,743.56 and 198,530.67 is: 273,961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,392.48 : 440,743.56 = 198,530.67 : x
  2. Step 2: Convert to fraction form
    319,392.48/440,743.56 = 198,530.67/x
  3. Step 3: Cross multiply
    319,392.48x = 440,743.56 × 198,530.67
  4. Step 4: Simplify right side
    319,392.48x = 87,501,114,264.99
  5. Step 5: Solve for x
    x = 87,501,114,264.99/319,392.48
  6. Step 6: Final answer
    x = 273,961.10

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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.