Home / 655,890.31-905,130.51-380,301.58

Finding the Fourth Proportional to 655,890.31, 905,130.51 and 380,301.58

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Solution

The fourth proportional to 655,890.31, 905,130.51 and 380,301.58 is: 524,817.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,890.31 : 905,130.51 = 380,301.58 : x
  2. Step 2: Convert to fraction form
    655,890.31/905,130.51 = 380,301.58/x
  3. Step 3: Cross multiply
    655,890.31x = 905,130.51 × 380,301.58
  4. Step 4: Simplify right side
    655,890.31x = 344,222,563,059.21
  5. Step 5: Solve for x
    x = 344,222,563,059.21/655,890.31
  6. Step 6: Final answer
    x = 524,817.27

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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.