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Finding the Fourth Proportional to 485,882.46, 670,534.47 and 281,917.98

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Solution

The fourth proportional to 485,882.46, 670,534.47 and 281,917.98 is: 389,056.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,882.46 : 670,534.47 = 281,917.98 : x
  2. Step 2: Convert to fraction form
    485,882.46/670,534.47 = 281,917.98/x
  3. Step 3: Cross multiply
    485,882.46x = 670,534.47 × 281,917.98
  4. Step 4: Simplify right side
    485,882.46x = 189,035,723,302.77
  5. Step 5: Solve for x
    x = 189,035,723,302.77/485,882.46
  6. Step 6: Final answer
    x = 389,056.49

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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.