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Finding the Fourth Proportional to 1,145.95, 1,580.97 and 673.86

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Solution

The fourth proportional to 1,145.95, 1,580.97 and 673.86 is: 929.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.95 : 1,580.97 = 673.86 : x
  2. Step 2: Convert to fraction form
    1,145.95/1,580.97 = 673.86/x
  3. Step 3: Cross multiply
    1,145.95x = 1,580.97 × 673.86
  4. Step 4: Simplify right side
    1,145.95x = 1,065,352.44
  5. Step 5: Solve for x
    x = 1,065,352.44/1,145.95
  6. Step 6: Final answer
    x = 929.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.