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Finding the Fourth Proportional to 702.15, 1,051.25 and 372.34

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Solution

The fourth proportional to 702.15, 1,051.25 and 372.34 is: 557.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.15 : 1,051.25 = 372.34 : x
  2. Step 2: Convert to fraction form
    702.15/1,051.25 = 372.34/x
  3. Step 3: Cross multiply
    702.15x = 1,051.25 × 372.34
  4. Step 4: Simplify right side
    702.15x = 391,423.27
  5. Step 5: Solve for x
    x = 391,423.27/702.15
  6. Step 6: Final answer
    x = 557.47

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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.