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Finding the Fourth Proportional to 1,785.94, 2,678.93 and 615.89

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Solution

The fourth proportional to 1,785.94, 2,678.93 and 615.89 is: 923.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.94 : 2,678.93 = 615.89 : x
  2. Step 2: Convert to fraction form
    1,785.94/2,678.93 = 615.89/x
  3. Step 3: Cross multiply
    1,785.94x = 2,678.93 × 615.89
  4. Step 4: Simplify right side
    1,785.94x = 1,649,926.20
  5. Step 5: Solve for x
    x = 1,649,926.20/1,785.94
  6. Step 6: Final answer
    x = 923.84

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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.