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Finding the Fourth Proportional to 785.07, 1,176.27 and 578.52

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Solution

The fourth proportional to 785.07, 1,176.27 and 578.52 is: 866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.07 : 1,176.27 = 578.52 : x
  2. Step 2: Convert to fraction form
    785.07/1,176.27 = 578.52/x
  3. Step 3: Cross multiply
    785.07x = 1,176.27 × 578.52
  4. Step 4: Simplify right side
    785.07x = 680,495.72
  5. Step 5: Solve for x
    x = 680,495.72/785.07
  6. Step 6: Final answer
    x = 866.80

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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.