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Finding the Fourth Proportional to 4,921.65, 7,383.42 and 1,590.79

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Solution

The fourth proportional to 4,921.65, 7,383.42 and 1,590.79 is: 2,386.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,921.65 : 7,383.42 = 1,590.79 : x
  2. Step 2: Convert to fraction form
    4,921.65/7,383.42 = 1,590.79/x
  3. Step 3: Cross multiply
    4,921.65x = 7,383.42 × 1,590.79
  4. Step 4: Simplify right side
    4,921.65x = 11,745,479.93
  5. Step 5: Solve for x
    x = 11,745,479.93/4,921.65
  6. Step 6: Final answer
    x = 2,386.49

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Similar ratio
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1.5x scale

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.