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Finding the Fourth Proportional to 275,140.40, 385,459 and 275,140.40

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Solution

The fourth proportional to 275,140.40, 385,459 and 275,140.40 is: 385,459

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,140.40 : 385,459 = 275,140.40 : x
  2. Step 2: Convert to fraction form
    275,140.40/385,459 = 275,140.40/x
  3. Step 3: Cross multiply
    275,140.40x = 385,459 × 275,140.40
  4. Step 4: Simplify right side
    275,140.40x = 106,055,343,443.60
  5. Step 5: Solve for x
    x = 106,055,343,443.60/275,140.40
  6. Step 6: Final answer
    x = 385,459

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.