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Finding the Fourth Proportional to 259,849.80, 389,774.70 and 147,875.40

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Solution

The fourth proportional to 259,849.80, 389,774.70 and 147,875.40 is: 221,813.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,849.80 : 389,774.70 = 147,875.40 : x
  2. Step 2: Convert to fraction form
    259,849.80/389,774.70 = 147,875.40/x
  3. Step 3: Cross multiply
    259,849.80x = 389,774.70 × 147,875.40
  4. Step 4: Simplify right side
    259,849.80x = 57,638,089,672.38
  5. Step 5: Solve for x
    x = 57,638,089,672.38/259,849.80
  6. Step 6: Final answer
    x = 221,813.10

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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.