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Finding the Fourth Proportional to 616.60, 848.84 and 485.38

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Solution

The fourth proportional to 616.60, 848.84 and 485.38 is: 668.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.60 : 848.84 = 485.38 : x
  2. Step 2: Convert to fraction form
    616.60/848.84 = 485.38/x
  3. Step 3: Cross multiply
    616.60x = 848.84 × 485.38
  4. Step 4: Simplify right side
    616.60x = 412,009.96
  5. Step 5: Solve for x
    x = 412,009.96/616.60
  6. Step 6: Final answer
    x = 668.20

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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.