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Finding the Fourth Proportional to 703.98, 1,055.34 and 339.12

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Solution

The fourth proportional to 703.98, 1,055.34 and 339.12 is: 508.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.98 : 1,055.34 = 339.12 : x
  2. Step 2: Convert to fraction form
    703.98/1,055.34 = 339.12/x
  3. Step 3: Cross multiply
    703.98x = 1,055.34 × 339.12
  4. Step 4: Simplify right side
    703.98x = 357,886.90
  5. Step 5: Solve for x
    x = 357,886.90/703.98
  6. Step 6: Final answer
    x = 508.38

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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.