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Finding the Fourth Proportional to 590.95, 890.85 and 551.31

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Solution

The fourth proportional to 590.95, 890.85 and 551.31 is: 831.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.95 : 890.85 = 551.31 : x
  2. Step 2: Convert to fraction form
    590.95/890.85 = 551.31/x
  3. Step 3: Cross multiply
    590.95x = 890.85 × 551.31
  4. Step 4: Simplify right side
    590.95x = 491,130.06
  5. Step 5: Solve for x
    x = 491,130.06/590.95
  6. Step 6: Final answer
    x = 831.09

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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.