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Finding the Fourth Proportional to 702.83, 1,054.16 and 312.84

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Solution

The fourth proportional to 702.83, 1,054.16 and 312.84 is: 469.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.83 : 1,054.16 = 312.84 : x
  2. Step 2: Convert to fraction form
    702.83/1,054.16 = 312.84/x
  3. Step 3: Cross multiply
    702.83x = 1,054.16 × 312.84
  4. Step 4: Simplify right side
    702.83x = 329,776.58
  5. Step 5: Solve for x
    x = 329,776.58/702.83
  6. Step 6: Final answer
    x = 469.22

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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.