Home / 390,961.89-586,491.12-138,190.25

Finding the Fourth Proportional to 390,961.89, 586,491.12 and 138,190.25

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Solution

The fourth proportional to 390,961.89, 586,491.12 and 138,190.25 is: 207,302.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,961.89 : 586,491.12 = 138,190.25 : x
  2. Step 2: Convert to fraction form
    390,961.89/586,491.12 = 138,190.25/x
  3. Step 3: Cross multiply
    390,961.89x = 586,491.12 × 138,190.25
  4. Step 4: Simplify right side
    390,961.89x = 81,047,351,563.12
  5. Step 5: Solve for x
    x = 81,047,351,563.12/390,961.89
  6. Step 6: Final answer
    x = 207,302.43

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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.