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Finding the Fourth Proportional to 1,303.35, 1,951.17 and 840.43

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Solution

The fourth proportional to 1,303.35, 1,951.17 and 840.43 is: 1,258.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,303.35 : 1,951.17 = 840.43 : x
  2. Step 2: Convert to fraction form
    1,303.35/1,951.17 = 840.43/x
  3. Step 3: Cross multiply
    1,303.35x = 1,951.17 × 840.43
  4. Step 4: Simplify right side
    1,303.35x = 1,639,821.80
  5. Step 5: Solve for x
    x = 1,639,821.80/1,303.35
  6. Step 6: Final answer
    x = 1,258.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.