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Finding the Fourth Proportional to 511.51, 763.40 and 476.83

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Solution

The fourth proportional to 511.51, 763.40 and 476.83 is: 711.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.51 : 763.40 = 476.83 : x
  2. Step 2: Convert to fraction form
    511.51/763.40 = 476.83/x
  3. Step 3: Cross multiply
    511.51x = 763.40 × 476.83
  4. Step 4: Simplify right side
    511.51x = 364,012.02
  5. Step 5: Solve for x
    x = 364,012.02/511.51
  6. Step 6: Final answer
    x = 711.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.