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Finding the Fourth Proportional to 804.57, 1,207.02 and 458.07

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Solution

The fourth proportional to 804.57, 1,207.02 and 458.07 is: 687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.57 : 1,207.02 = 458.07 : x
  2. Step 2: Convert to fraction form
    804.57/1,207.02 = 458.07/x
  3. Step 3: Cross multiply
    804.57x = 1,207.02 × 458.07
  4. Step 4: Simplify right side
    804.57x = 552,899.65
  5. Step 5: Solve for x
    x = 552,899.65/804.57
  6. Step 6: Final answer
    x = 687.20

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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.