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Finding the Fourth Proportional to 485,679.75, 670,238.06 and 284,475.75

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Solution

The fourth proportional to 485,679.75, 670,238.06 and 284,475.75 is: 392,576.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,679.75 : 670,238.06 = 284,475.75 : x
  2. Step 2: Convert to fraction form
    485,679.75/670,238.06 = 284,475.75/x
  3. Step 3: Cross multiply
    485,679.75x = 670,238.06 × 284,475.75
  4. Step 4: Simplify right side
    485,679.75x = 190,666,473,374.67
  5. Step 5: Solve for x
    x = 190,666,473,374.67/485,679.75
  6. Step 6: Final answer
    x = 392,576.54

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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.