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Finding the Fourth Proportional to 1,124.45, 1,551.68 and 627.07

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Solution

The fourth proportional to 1,124.45, 1,551.68 and 627.07 is: 865.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.45 : 1,551.68 = 627.07 : x
  2. Step 2: Convert to fraction form
    1,124.45/1,551.68 = 627.07/x
  3. Step 3: Cross multiply
    1,124.45x = 1,551.68 × 627.07
  4. Step 4: Simplify right side
    1,124.45x = 973,011.98
  5. Step 5: Solve for x
    x = 973,011.98/1,124.45
  6. Step 6: Final answer
    x = 865.32

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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.