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Finding the Fourth Proportional to 458.59, 631.87 and 383.64

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Solution

The fourth proportional to 458.59, 631.87 and 383.64 is: 528.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.59 : 631.87 = 383.64 : x
  2. Step 2: Convert to fraction form
    458.59/631.87 = 383.64/x
  3. Step 3: Cross multiply
    458.59x = 631.87 × 383.64
  4. Step 4: Simplify right side
    458.59x = 242,409.65
  5. Step 5: Solve for x
    x = 242,409.65/458.59
  6. Step 6: Final answer
    x = 528.60

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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.