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Finding the Fourth Proportional to 848.20, 1,271.08 and 482.21

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Solution

The fourth proportional to 848.20, 1,271.08 and 482.21 is: 722.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.20 : 1,271.08 = 482.21 : x
  2. Step 2: Convert to fraction form
    848.20/1,271.08 = 482.21/x
  3. Step 3: Cross multiply
    848.20x = 1,271.08 × 482.21
  4. Step 4: Simplify right side
    848.20x = 612,931.27
  5. Step 5: Solve for x
    x = 612,931.27/848.20
  6. Step 6: Final answer
    x = 722.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.