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Finding the Fourth Proportional to 1,551.54, 2,140.93 and 922.08

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Solution

The fourth proportional to 1,551.54, 2,140.93 and 922.08 is: 1,272.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.54 : 2,140.93 = 922.08 : x
  2. Step 2: Convert to fraction form
    1,551.54/2,140.93 = 922.08/x
  3. Step 3: Cross multiply
    1,551.54x = 2,140.93 × 922.08
  4. Step 4: Simplify right side
    1,551.54x = 1,974,108.73
  5. Step 5: Solve for x
    x = 1,974,108.73/1,551.54
  6. Step 6: Final answer
    x = 1,272.35

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1.5x scale

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.