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Finding the Fourth Proportional to 290,853.64, 436,280.59 and 91,189.60

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Solution

The fourth proportional to 290,853.64, 436,280.59 and 91,189.60 is: 136,784.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,853.64 : 436,280.59 = 91,189.60 : x
  2. Step 2: Convert to fraction form
    290,853.64/436,280.59 = 91,189.60/x
  3. Step 3: Cross multiply
    290,853.64x = 436,280.59 × 91,189.60
  4. Step 4: Simplify right side
    290,853.64x = 39,784,250,080.49
  5. Step 5: Solve for x
    x = 39,784,250,080.49/290,853.64
  6. Step 6: Final answer
    x = 136,784.43

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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.