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Finding the Fourth Proportional to 485,224.80, 669,612.88 and 281,396.60

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Solution

The fourth proportional to 485,224.80, 669,612.88 and 281,396.60 is: 388,328.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,224.80 : 669,612.88 = 281,396.60 : x
  2. Step 2: Convert to fraction form
    485,224.80/669,612.88 = 281,396.60/x
  3. Step 3: Cross multiply
    485,224.80x = 669,612.88 × 281,396.60
  4. Step 4: Simplify right side
    485,224.80x = 188,426,787,748.21
  5. Step 5: Solve for x
    x = 188,426,787,748.21/485,224.80
  6. Step 6: Final answer
    x = 388,328.85

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1.5x scale

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.