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Finding the Fourth Proportional to 572.05, 787.76 and 556.93

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Solution

The fourth proportional to 572.05, 787.76 and 556.93 is: 766.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.05 : 787.76 = 556.93 : x
  2. Step 2: Convert to fraction form
    572.05/787.76 = 556.93/x
  3. Step 3: Cross multiply
    572.05x = 787.76 × 556.93
  4. Step 4: Simplify right side
    572.05x = 438,724.39
  5. Step 5: Solve for x
    x = 438,724.39/572.05
  6. Step 6: Final answer
    x = 766.93

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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.