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Finding the Fourth Proportional to 1,489.95, 2,055.61 and 930.22

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Solution

The fourth proportional to 1,489.95, 2,055.61 and 930.22 is: 1,283.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.95 : 2,055.61 = 930.22 : x
  2. Step 2: Convert to fraction form
    1,489.95/2,055.61 = 930.22/x
  3. Step 3: Cross multiply
    1,489.95x = 2,055.61 × 930.22
  4. Step 4: Simplify right side
    1,489.95x = 1,912,159.26
  5. Step 5: Solve for x
    x = 1,912,159.26/1,489.95
  6. Step 6: Final answer
    x = 1,283.37

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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.