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Finding the Fourth Proportional to 330,328.49, 495,486 and 105,688.89

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Solution

The fourth proportional to 330,328.49, 495,486 and 105,688.89 is: 158,531.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,328.49 : 495,486 = 105,688.89 : x
  2. Step 2: Convert to fraction form
    330,328.49/495,486 = 105,688.89/x
  3. Step 3: Cross multiply
    330,328.49x = 495,486 × 105,688.89
  4. Step 4: Simplify right side
    330,328.49x = 52,367,365,350.54
  5. Step 5: Solve for x
    x = 52,367,365,350.54/330,328.49
  6. Step 6: Final answer
    x = 158,531.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.