Home / 1,680.51-2,319.13-934.54

Finding the Fourth Proportional to 1,680.51, 2,319.13 and 934.54

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Solution

The fourth proportional to 1,680.51, 2,319.13 and 934.54 is: 1,289.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.51 : 2,319.13 = 934.54 : x
  2. Step 2: Convert to fraction form
    1,680.51/2,319.13 = 934.54/x
  3. Step 3: Cross multiply
    1,680.51x = 2,319.13 × 934.54
  4. Step 4: Simplify right side
    1,680.51x = 2,167,315.12
  5. Step 5: Solve for x
    x = 2,167,315.12/1,680.51
  6. Step 6: Final answer
    x = 1,289.67

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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.