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Finding the Fourth Proportional to 1,316.85, 1,974.63 and 623.37

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Solution

The fourth proportional to 1,316.85, 1,974.63 and 623.37 is: 934.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.85 : 1,974.63 = 623.37 : x
  2. Step 2: Convert to fraction form
    1,316.85/1,974.63 = 623.37/x
  3. Step 3: Cross multiply
    1,316.85x = 1,974.63 × 623.37
  4. Step 4: Simplify right side
    1,316.85x = 1,230,925.10
  5. Step 5: Solve for x
    x = 1,230,925.10/1,316.85
  6. Step 6: Final answer
    x = 934.75

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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.