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Finding the Fourth Proportional to 784.35, 1,175.91 and 476.13

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Solution

The fourth proportional to 784.35, 1,175.91 and 476.13 is: 713.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.35 : 1,175.91 = 476.13 : x
  2. Step 2: Convert to fraction form
    784.35/1,175.91 = 476.13/x
  3. Step 3: Cross multiply
    784.35x = 1,175.91 × 476.13
  4. Step 4: Simplify right side
    784.35x = 559,886.03
  5. Step 5: Solve for x
    x = 559,886.03/784.35
  6. Step 6: Final answer
    x = 713.82

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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.