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Finding the Fourth Proportional to 330,378.57, 455,907.83 and 187,135.74

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Solution

The fourth proportional to 330,378.57, 455,907.83 and 187,135.74 is: 258,239.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,378.57 : 455,907.83 = 187,135.74 : x
  2. Step 2: Convert to fraction form
    330,378.57/455,907.83 = 187,135.74/x
  3. Step 3: Cross multiply
    330,378.57x = 455,907.83 × 187,135.74
  4. Step 4: Simplify right side
    330,378.57x = 85,316,648,203.17
  5. Step 5: Solve for x
    x = 85,316,648,203.17/330,378.57
  6. Step 6: Final answer
    x = 258,239.05

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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.