Home / 1,905.79-2,859.09-607.21

Finding the Fourth Proportional to 1,905.79, 2,859.09 and 607.21

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Solution

The fourth proportional to 1,905.79, 2,859.09 and 607.21 is: 910.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.79 : 2,859.09 = 607.21 : x
  2. Step 2: Convert to fraction form
    1,905.79/2,859.09 = 607.21/x
  3. Step 3: Cross multiply
    1,905.79x = 2,859.09 × 607.21
  4. Step 4: Simplify right side
    1,905.79x = 1,736,068.04
  5. Step 5: Solve for x
    x = 1,736,068.04/1,905.79
  6. Step 6: Final answer
    x = 910.94

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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.