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Finding the Fourth Proportional to 558.16, 830.93 and 551.92

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Solution

The fourth proportional to 558.16, 830.93 and 551.92 is: 821.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.16 : 830.93 = 551.92 : x
  2. Step 2: Convert to fraction form
    558.16/830.93 = 551.92/x
  3. Step 3: Cross multiply
    558.16x = 830.93 × 551.92
  4. Step 4: Simplify right side
    558.16x = 458,606.89
  5. Step 5: Solve for x
    x = 458,606.89/558.16
  6. Step 6: Final answer
    x = 821.64

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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.