Home / 1,709.40-2,562.43-928.70

Finding the Fourth Proportional to 1,709.40, 2,562.43 and 928.70

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Solution

The fourth proportional to 1,709.40, 2,562.43 and 928.70 is: 1,392.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.40 : 2,562.43 = 928.70 : x
  2. Step 2: Convert to fraction form
    1,709.40/2,562.43 = 928.70/x
  3. Step 3: Cross multiply
    1,709.40x = 2,562.43 × 928.70
  4. Step 4: Simplify right side
    1,709.40x = 2,379,728.74
  5. Step 5: Solve for x
    x = 2,379,728.74/1,709.40
  6. Step 6: Final answer
    x = 1,392.14

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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.