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Finding the Fourth Proportional to 547,431.54, 755,447.95 and 318,118.38

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Solution

The fourth proportional to 547,431.54, 755,447.95 and 318,118.38 is: 438,998.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,431.54 : 755,447.95 = 318,118.38 : x
  2. Step 2: Convert to fraction form
    547,431.54/755,447.95 = 318,118.38/x
  3. Step 3: Cross multiply
    547,431.54x = 755,447.95 × 318,118.38
  4. Step 4: Simplify right side
    547,431.54x = 240,321,878,028.32
  5. Step 5: Solve for x
    x = 240,321,878,028.32/547,431.54
  6. Step 6: Final answer
    x = 438,998.96

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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.