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Finding the Fourth Proportional to 318,646.84, 439,745.18 and 175,420.20

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Solution

The fourth proportional to 318,646.84, 439,745.18 and 175,420.20 is: 242,086.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,646.84 : 439,745.18 = 175,420.20 : x
  2. Step 2: Convert to fraction form
    318,646.84/439,745.18 = 175,420.20/x
  3. Step 3: Cross multiply
    318,646.84x = 439,745.18 × 175,420.20
  4. Step 4: Simplify right side
    318,646.84x = 77,140,187,424.64
  5. Step 5: Solve for x
    x = 77,140,187,424.64/318,646.84
  6. Step 6: Final answer
    x = 242,086.78

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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.