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Finding the Fourth Proportional to 723.50, 1,085.54 and 284.88

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Solution

The fourth proportional to 723.50, 1,085.54 and 284.88 is: 427.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.50 : 1,085.54 = 284.88 : x
  2. Step 2: Convert to fraction form
    723.50/1,085.54 = 284.88/x
  3. Step 3: Cross multiply
    723.50x = 1,085.54 × 284.88
  4. Step 4: Simplify right side
    723.50x = 309,248.64
  5. Step 5: Solve for x
    x = 309,248.64/723.50
  6. Step 6: Final answer
    x = 427.43

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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.