Home / 2,421.50-3,632.82-690.08

Finding the Fourth Proportional to 2,421.50, 3,632.82 and 690.08

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Solution

The fourth proportional to 2,421.50, 3,632.82 and 690.08 is: 1,035.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.50 : 3,632.82 = 690.08 : x
  2. Step 2: Convert to fraction form
    2,421.50/3,632.82 = 690.08/x
  3. Step 3: Cross multiply
    2,421.50x = 3,632.82 × 690.08
  4. Step 4: Simplify right side
    2,421.50x = 2,506,936.43
  5. Step 5: Solve for x
    x = 2,506,936.43/2,421.50
  6. Step 6: Final answer
    x = 1,035.28

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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.