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Finding the Fourth Proportional to 551.91, 830.86 and 476.58

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Solution

The fourth proportional to 551.91, 830.86 and 476.58 is: 717.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.91 : 830.86 = 476.58 : x
  2. Step 2: Convert to fraction form
    551.91/830.86 = 476.58/x
  3. Step 3: Cross multiply
    551.91x = 830.86 × 476.58
  4. Step 4: Simplify right side
    551.91x = 395,973.18
  5. Step 5: Solve for x
    x = 395,973.18/551.91
  6. Step 6: Final answer
    x = 717.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.