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Finding the Fourth Proportional to 784.47, 1,176.72 and 297.39

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Solution

The fourth proportional to 784.47, 1,176.72 and 297.39 is: 446.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.47 : 1,176.72 = 297.39 : x
  2. Step 2: Convert to fraction form
    784.47/1,176.72 = 297.39/x
  3. Step 3: Cross multiply
    784.47x = 1,176.72 × 297.39
  4. Step 4: Simplify right side
    784.47x = 349,944.76
  5. Step 5: Solve for x
    x = 349,944.76/784.47
  6. Step 6: Final answer
    x = 446.09

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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.