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Finding the Fourth Proportional to 1,017.45, 1,404.07 and 551.70

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Solution

The fourth proportional to 1,017.45, 1,404.07 and 551.70 is: 761.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.45 : 1,404.07 = 551.70 : x
  2. Step 2: Convert to fraction form
    1,017.45/1,404.07 = 551.70/x
  3. Step 3: Cross multiply
    1,017.45x = 1,404.07 × 551.70
  4. Step 4: Simplify right side
    1,017.45x = 774,625.42
  5. Step 5: Solve for x
    x = 774,625.42/1,017.45
  6. Step 6: Final answer
    x = 761.34

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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.