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Finding the Fourth Proportional to 984.81, 1,477.40 and 291.48

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Solution

The fourth proportional to 984.81, 1,477.40 and 291.48 is: 437.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.81 : 1,477.40 = 291.48 : x
  2. Step 2: Convert to fraction form
    984.81/1,477.40 = 291.48/x
  3. Step 3: Cross multiply
    984.81x = 1,477.40 × 291.48
  4. Step 4: Simplify right side
    984.81x = 430,632.55
  5. Step 5: Solve for x
    x = 430,632.55/984.81
  6. Step 6: Final answer
    x = 437.27

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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.