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Finding the Fourth Proportional to 275,971.70, 380,836.40 and 153,459.20

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Solution

The fourth proportional to 275,971.70, 380,836.40 and 153,459.20 is: 211,771.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,971.70 : 380,836.40 = 153,459.20 : x
  2. Step 2: Convert to fraction form
    275,971.70/380,836.40 = 153,459.20/x
  3. Step 3: Cross multiply
    275,971.70x = 380,836.40 × 153,459.20
  4. Step 4: Simplify right side
    275,971.70x = 58,442,849,274.88
  5. Step 5: Solve for x
    x = 58,442,849,274.88/275,971.70
  6. Step 6: Final answer
    x = 211,771.17

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1.5x scale

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.