Home / 1,291.59-1,783.85-1,000.38

Finding the Fourth Proportional to 1,291.59, 1,783.85 and 1,000.38

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Solution

The fourth proportional to 1,291.59, 1,783.85 and 1,000.38 is: 1,381.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.59 : 1,783.85 = 1,000.38 : x
  2. Step 2: Convert to fraction form
    1,291.59/1,783.85 = 1,000.38/x
  3. Step 3: Cross multiply
    1,291.59x = 1,783.85 × 1,000.38
  4. Step 4: Simplify right side
    1,291.59x = 1,784,522.86
  5. Step 5: Solve for x
    x = 1,784,522.86/1,291.59
  6. Step 6: Final answer
    x = 1,381.65

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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.