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Finding the Fourth Proportional to 634.76, 873.74 and 555.89

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Solution

The fourth proportional to 634.76, 873.74 and 555.89 is: 765.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.76 : 873.74 = 555.89 : x
  2. Step 2: Convert to fraction form
    634.76/873.74 = 555.89/x
  3. Step 3: Cross multiply
    634.76x = 873.74 × 555.89
  4. Step 4: Simplify right side
    634.76x = 485,696.18
  5. Step 5: Solve for x
    x = 485,696.18/634.76
  6. Step 6: Final answer
    x = 765.16

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Double scale
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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.