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Finding the Fourth Proportional to 763.68, 1,146 and 555.06

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Solution

The fourth proportional to 763.68, 1,146 and 555.06 is: 832.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.68 : 1,146 = 555.06 : x
  2. Step 2: Convert to fraction form
    763.68/1,146 = 555.06/x
  3. Step 3: Cross multiply
    763.68x = 1,146 × 555.06
  4. Step 4: Simplify right side
    763.68x = 636,098.76
  5. Step 5: Solve for x
    x = 636,098.76/763.68
  6. Step 6: Final answer
    x = 832.94

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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.