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Finding the Fourth Proportional to 785.67, 1,177.58 and 351.91

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Solution

The fourth proportional to 785.67, 1,177.58 and 351.91 is: 527.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.67 : 1,177.58 = 351.91 : x
  2. Step 2: Convert to fraction form
    785.67/1,177.58 = 351.91/x
  3. Step 3: Cross multiply
    785.67x = 1,177.58 × 351.91
  4. Step 4: Simplify right side
    785.67x = 414,402.18
  5. Step 5: Solve for x
    x = 414,402.18/785.67
  6. Step 6: Final answer
    x = 527.45

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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.