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Finding the Fourth Proportional to 1,233.32, 1,702.26 and 840.50

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Solution

The fourth proportional to 1,233.32, 1,702.26 and 840.50 is: 1,160.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.32 : 1,702.26 = 840.50 : x
  2. Step 2: Convert to fraction form
    1,233.32/1,702.26 = 840.50/x
  3. Step 3: Cross multiply
    1,233.32x = 1,702.26 × 840.50
  4. Step 4: Simplify right side
    1,233.32x = 1,430,749.53
  5. Step 5: Solve for x
    x = 1,430,749.53/1,233.32
  6. Step 6: Final answer
    x = 1,160.08

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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.