Home / 1,421.42-1,957.64-1,224.86

Finding the Fourth Proportional to 1,421.42, 1,957.64 and 1,224.86

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Solution

The fourth proportional to 1,421.42, 1,957.64 and 1,224.86 is: 1,686.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.42 : 1,957.64 = 1,224.86 : x
  2. Step 2: Convert to fraction form
    1,421.42/1,957.64 = 1,224.86/x
  3. Step 3: Cross multiply
    1,421.42x = 1,957.64 × 1,224.86
  4. Step 4: Simplify right side
    1,421.42x = 2,397,834.93
  5. Step 5: Solve for x
    x = 2,397,834.93/1,421.42
  6. Step 6: Final answer
    x = 1,686.93

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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.