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Finding the Fourth Proportional to 703.78, 1,056.31 and 357.35

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Solution

The fourth proportional to 703.78, 1,056.31 and 357.35 is: 536.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.78 : 1,056.31 = 357.35 : x
  2. Step 2: Convert to fraction form
    703.78/1,056.31 = 357.35/x
  3. Step 3: Cross multiply
    703.78x = 1,056.31 × 357.35
  4. Step 4: Simplify right side
    703.78x = 377,472.38
  5. Step 5: Solve for x
    x = 377,472.38/703.78
  6. Step 6: Final answer
    x = 536.35

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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.