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Finding the Fourth Proportional to 723.66, 1,085.70 and 353.49

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Solution

The fourth proportional to 723.66, 1,085.70 and 353.49 is: 530.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.66 : 1,085.70 = 353.49 : x
  2. Step 2: Convert to fraction form
    723.66/1,085.70 = 353.49/x
  3. Step 3: Cross multiply
    723.66x = 1,085.70 × 353.49
  4. Step 4: Simplify right side
    723.66x = 383,784.09
  5. Step 5: Solve for x
    x = 383,784.09/723.66
  6. Step 6: Final answer
    x = 530.34

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Double scale
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1.5x scale

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.