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Finding the Fourth Proportional to 702.58, 1,053.87 and 215.63

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Solution

The fourth proportional to 702.58, 1,053.87 and 215.63 is: 323.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.58 : 1,053.87 = 215.63 : x
  2. Step 2: Convert to fraction form
    702.58/1,053.87 = 215.63/x
  3. Step 3: Cross multiply
    702.58x = 1,053.87 × 215.63
  4. Step 4: Simplify right side
    702.58x = 227,245.99
  5. Step 5: Solve for x
    x = 227,245.99/702.58
  6. Step 6: Final answer
    x = 323.45

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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.