Home / 1,400.18-2,100.42-619.85

Finding the Fourth Proportional to 1,400.18, 2,100.42 and 619.85

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Solution

The fourth proportional to 1,400.18, 2,100.42 and 619.85 is: 929.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.18 : 2,100.42 = 619.85 : x
  2. Step 2: Convert to fraction form
    1,400.18/2,100.42 = 619.85/x
  3. Step 3: Cross multiply
    1,400.18x = 2,100.42 × 619.85
  4. Step 4: Simplify right side
    1,400.18x = 1,301,945.34
  5. Step 5: Solve for x
    x = 1,301,945.34/1,400.18
  6. Step 6: Final answer
    x = 929.84

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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.