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Finding the Fourth Proportional to 320,391.58, 480,587.82 and 130,851.98

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Solution

The fourth proportional to 320,391.58, 480,587.82 and 130,851.98 is: 196,278.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,391.58 : 480,587.82 = 130,851.98 : x
  2. Step 2: Convert to fraction form
    320,391.58/480,587.82 = 130,851.98/x
  3. Step 3: Cross multiply
    320,391.58x = 480,587.82 × 130,851.98
  4. Step 4: Simplify right side
    320,391.58x = 62,885,865,581.92
  5. Step 5: Solve for x
    x = 62,885,865,581.92/320,391.58
  6. Step 6: Final answer
    x = 196,278.15

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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.