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Finding the Fourth Proportional to 822.51, 1,230.65 and 476.00

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Solution

The fourth proportional to 822.51, 1,230.65 and 476.00 is: 712.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.51 : 1,230.65 = 476.00 : x
  2. Step 2: Convert to fraction form
    822.51/1,230.65 = 476.00/x
  3. Step 3: Cross multiply
    822.51x = 1,230.65 × 476.00
  4. Step 4: Simplify right side
    822.51x = 585,780.87
  5. Step 5: Solve for x
    x = 585,780.87/822.51
  6. Step 6: Final answer
    x = 712.19

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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.