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Finding the Fourth Proportional to 702.35, 1,054.34 and 378.35

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Solution

The fourth proportional to 702.35, 1,054.34 and 378.35 is: 567.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.35 : 1,054.34 = 378.35 : x
  2. Step 2: Convert to fraction form
    702.35/1,054.34 = 378.35/x
  3. Step 3: Cross multiply
    702.35x = 1,054.34 × 378.35
  4. Step 4: Simplify right side
    702.35x = 398,902.38
  5. Step 5: Solve for x
    x = 398,902.38/702.35
  6. Step 6: Final answer
    x = 567.96

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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.