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Finding the Fourth Proportional to 485,056.32, 669,384.84 and 281,122.32

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Solution

The fourth proportional to 485,056.32, 669,384.84 and 281,122.32 is: 387,952.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,056.32 : 669,384.84 = 281,122.32 : x
  2. Step 2: Convert to fraction form
    485,056.32/669,384.84 = 281,122.32/x
  3. Step 3: Cross multiply
    485,056.32x = 669,384.84 × 281,122.32
  4. Step 4: Simplify right side
    485,056.32x = 188,179,019,193.63
  5. Step 5: Solve for x
    x = 188,179,019,193.63/485,056.32
  6. Step 6: Final answer
    x = 387,952.93

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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.