Home / 2,421.75-3,632.67-690.42

Finding the Fourth Proportional to 2,421.75, 3,632.67 and 690.42

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Solution

The fourth proportional to 2,421.75, 3,632.67 and 690.42 is: 1,035.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.75 : 3,632.67 = 690.42 : x
  2. Step 2: Convert to fraction form
    2,421.75/3,632.67 = 690.42/x
  3. Step 3: Cross multiply
    2,421.75x = 3,632.67 × 690.42
  4. Step 4: Simplify right side
    2,421.75x = 2,508,068.02
  5. Step 5: Solve for x
    x = 2,508,068.02/2,421.75
  6. Step 6: Final answer
    x = 1,035.64

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1.5x scale

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.