Home / 1,420.86-2,131.67-433.65

Finding the Fourth Proportional to 1,420.86, 2,131.67 and 433.65

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Solution

The fourth proportional to 1,420.86, 2,131.67 and 433.65 is: 650.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.86 : 2,131.67 = 433.65 : x
  2. Step 2: Convert to fraction form
    1,420.86/2,131.67 = 433.65/x
  3. Step 3: Cross multiply
    1,420.86x = 2,131.67 × 433.65
  4. Step 4: Simplify right side
    1,420.86x = 924,398.70
  5. Step 5: Solve for x
    x = 924,398.70/1,420.86
  6. Step 6: Final answer
    x = 650.59

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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.