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Finding the Fourth Proportional to 1,203.54, 1,660.35 and 942.30

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Solution

The fourth proportional to 1,203.54, 1,660.35 and 942.30 is: 1,299.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.54 : 1,660.35 = 942.30 : x
  2. Step 2: Convert to fraction form
    1,203.54/1,660.35 = 942.30/x
  3. Step 3: Cross multiply
    1,203.54x = 1,660.35 × 942.30
  4. Step 4: Simplify right side
    1,203.54x = 1,564,547.81
  5. Step 5: Solve for x
    x = 1,564,547.81/1,203.54
  6. Step 6: Final answer
    x = 1,299.95

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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.