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Finding the Fourth Proportional to 259,620.10, 389,430.15 and 141,522.10

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Solution

The fourth proportional to 259,620.10, 389,430.15 and 141,522.10 is: 212,283.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,620.10 : 389,430.15 = 141,522.10 : x
  2. Step 2: Convert to fraction form
    259,620.10/389,430.15 = 141,522.10/x
  3. Step 3: Cross multiply
    259,620.10x = 389,430.15 × 141,522.10
  4. Step 4: Simplify right side
    259,620.10x = 55,112,972,631.32
  5. Step 5: Solve for x
    x = 55,112,972,631.32/259,620.10
  6. Step 6: Final answer
    x = 212,283.15

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1.5x scale

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.