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Finding the Fourth Proportional to 330,405.90, 495,280.80 and 152,602.80

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Solution

The fourth proportional to 330,405.90, 495,280.80 and 152,602.80 is: 228,752.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,405.90 : 495,280.80 = 152,602.80 : x
  2. Step 2: Convert to fraction form
    330,405.90/495,280.80 = 152,602.80/x
  3. Step 3: Cross multiply
    330,405.90x = 495,280.80 × 152,602.80
  4. Step 4: Simplify right side
    330,405.90x = 75,581,236,866.24
  5. Step 5: Solve for x
    x = 75,581,236,866.24/330,405.90
  6. Step 6: Final answer
    x = 228,752.69

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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.