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Finding the Fourth Proportional to 785.94, 1,177.50 and 655.14

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Solution

The fourth proportional to 785.94, 1,177.50 and 655.14 is: 981.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.94 : 1,177.50 = 655.14 : x
  2. Step 2: Convert to fraction form
    785.94/1,177.50 = 655.14/x
  3. Step 3: Cross multiply
    785.94x = 1,177.50 × 655.14
  4. Step 4: Simplify right side
    785.94x = 771,427.35
  5. Step 5: Solve for x
    x = 771,427.35/785.94
  6. Step 6: Final answer
    x = 981.53

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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.