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Finding the Fourth Proportional to 290,923.87, 436,381.43 and 130,886.79

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Solution

The fourth proportional to 290,923.87, 436,381.43 and 130,886.79 is: 196,328.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,923.87 : 436,381.43 = 130,886.79 : x
  2. Step 2: Convert to fraction form
    290,923.87/436,381.43 = 130,886.79/x
  3. Step 3: Cross multiply
    290,923.87x = 436,381.43 × 130,886.79
  4. Step 4: Simplify right side
    290,923.87x = 57,116,564,588.31
  5. Step 5: Solve for x
    x = 57,116,564,588.31/290,923.87
  6. Step 6: Final answer
    x = 196,328.22

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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.