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Finding the Fourth Proportional to 784.23, 1,176.40 and 297.28

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Solution

The fourth proportional to 784.23, 1,176.40 and 297.28 is: 445.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.23 : 1,176.40 = 297.28 : x
  2. Step 2: Convert to fraction form
    784.23/1,176.40 = 297.28/x
  3. Step 3: Cross multiply
    784.23x = 1,176.40 × 297.28
  4. Step 4: Simplify right side
    784.23x = 349,722.03
  5. Step 5: Solve for x
    x = 349,722.03/784.23
  6. Step 6: Final answer
    x = 445.94

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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.