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Finding the Fourth Proportional to 985, 1,477.52 and 551.56

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Solution

The fourth proportional to 985, 1,477.52 and 551.56 is: 827.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    985 : 1,477.52 = 551.56 : x
  2. Step 2: Convert to fraction form
    985/1,477.52 = 551.56/x
  3. Step 3: Cross multiply
    985x = 1,477.52 × 551.56
  4. Step 4: Simplify right side
    985x = 814,940.93
  5. Step 5: Solve for x
    x = 814,940.93/985
  6. Step 6: Final answer
    x = 827.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.