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Finding the Fourth Proportional to 702.86, 1,052.67 and 678.56

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Solution

The fourth proportional to 702.86, 1,052.67 and 678.56 is: 1,016.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.86 : 1,052.67 = 678.56 : x
  2. Step 2: Convert to fraction form
    702.86/1,052.67 = 678.56/x
  3. Step 3: Cross multiply
    702.86x = 1,052.67 × 678.56
  4. Step 4: Simplify right side
    702.86x = 714,299.76
  5. Step 5: Solve for x
    x = 714,299.76/702.86
  6. Step 6: Final answer
    x = 1,016.28

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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.