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Finding the Fourth Proportional to 318,647.28, 439,745.82 and 175,420.65

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Solution

The fourth proportional to 318,647.28, 439,745.82 and 175,420.65 is: 242,087.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,647.28 : 439,745.82 = 175,420.65 : x
  2. Step 2: Convert to fraction form
    318,647.28/439,745.82 = 175,420.65/x
  3. Step 3: Cross multiply
    318,647.28x = 439,745.82 × 175,420.65
  4. Step 4: Simplify right side
    318,647.28x = 77,140,497,579.18
  5. Step 5: Solve for x
    x = 77,140,497,579.18/318,647.28
  6. Step 6: Final answer
    x = 242,087.42

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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.