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Finding the Fourth Proportional to 874.98, 1,207.43 and 482.00

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Solution

The fourth proportional to 874.98, 1,207.43 and 482.00 is: 665.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.98 : 1,207.43 = 482.00 : x
  2. Step 2: Convert to fraction form
    874.98/1,207.43 = 482.00/x
  3. Step 3: Cross multiply
    874.98x = 1,207.43 × 482.00
  4. Step 4: Simplify right side
    874.98x = 581,975.22
  5. Step 5: Solve for x
    x = 581,975.22/874.98
  6. Step 6: Final answer
    x = 665.13

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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.