Home / 2,421.40-3,632.10-666.40

Finding the Fourth Proportional to 2,421.40, 3,632.10 and 666.40

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Solution

The fourth proportional to 2,421.40, 3,632.10 and 666.40 is: 999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.40 : 3,632.10 = 666.40 : x
  2. Step 2: Convert to fraction form
    2,421.40/3,632.10 = 666.40/x
  3. Step 3: Cross multiply
    2,421.40x = 3,632.10 × 666.40
  4. Step 4: Simplify right side
    2,421.40x = 2,420,431.44
  5. Step 5: Solve for x
    x = 2,420,431.44/2,421.40
  6. Step 6: Final answer
    x = 999.60

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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.