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Finding the Fourth Proportional to 702.55, 1,054.05 and 291.88

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Solution

The fourth proportional to 702.55, 1,054.05 and 291.88 is: 437.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.55 : 1,054.05 = 291.88 : x
  2. Step 2: Convert to fraction form
    702.55/1,054.05 = 291.88/x
  3. Step 3: Cross multiply
    702.55x = 1,054.05 × 291.88
  4. Step 4: Simplify right side
    702.55x = 307,656.11
  5. Step 5: Solve for x
    x = 307,656.11/702.55
  6. Step 6: Final answer
    x = 437.91

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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.