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Finding the Fourth Proportional to 290,839.32, 436,264.48 and 91,155.32

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Solution

The fourth proportional to 290,839.32, 436,264.48 and 91,155.32 is: 136,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,839.32 : 436,264.48 = 91,155.32 : x
  2. Step 2: Convert to fraction form
    290,839.32/436,264.48 = 91,155.32/x
  3. Step 3: Cross multiply
    290,839.32x = 436,264.48 × 91,155.32
  4. Step 4: Simplify right side
    290,839.32x = 39,767,828,279.03
  5. Step 5: Solve for x
    x = 39,767,828,279.03/290,839.32
  6. Step 6: Final answer
    x = 136,734.70

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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.