Home / 3,678.10-5,516.98-904.79

Finding the Fourth Proportional to 3,678.10, 5,516.98 and 904.79

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Solution

The fourth proportional to 3,678.10, 5,516.98 and 904.79 is: 1,357.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.10 : 5,516.98 = 904.79 : x
  2. Step 2: Convert to fraction form
    3,678.10/5,516.98 = 904.79/x
  3. Step 3: Cross multiply
    3,678.10x = 5,516.98 × 904.79
  4. Step 4: Simplify right side
    3,678.10x = 4,991,719.86
  5. Step 5: Solve for x
    x = 4,991,719.86/3,678.10
  6. Step 6: Final answer
    x = 1,357.15

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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.