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Finding the Fourth Proportional to 704.74, 1,056.38 and 339.25

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Solution

The fourth proportional to 704.74, 1,056.38 and 339.25 is: 508.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.74 : 1,056.38 = 339.25 : x
  2. Step 2: Convert to fraction form
    704.74/1,056.38 = 339.25/x
  3. Step 3: Cross multiply
    704.74x = 1,056.38 × 339.25
  4. Step 4: Simplify right side
    704.74x = 358,376.92
  5. Step 5: Solve for x
    x = 358,376.92/704.74
  6. Step 6: Final answer
    x = 508.52

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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.