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Finding the Fourth Proportional to 318,659, 439,778.70 and 175,448.12

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Solution

The fourth proportional to 318,659, 439,778.70 and 175,448.12 is: 242,134.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,659 : 439,778.70 = 175,448.12 : x
  2. Step 2: Convert to fraction form
    318,659/439,778.70 = 175,448.12/x
  3. Step 3: Cross multiply
    318,659x = 439,778.70 × 175,448.12
  4. Step 4: Simplify right side
    318,659x = 77,158,346,131.04
  5. Step 5: Solve for x
    x = 77,158,346,131.04/318,659
  6. Step 6: Final answer
    x = 242,134.53

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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.