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Finding the Fourth Proportional to 291,269.40, 436,904.10 and 80,909.40

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Solution

The fourth proportional to 291,269.40, 436,904.10 and 80,909.40 is: 121,364.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,269.40 : 436,904.10 = 80,909.40 : x
  2. Step 2: Convert to fraction form
    291,269.40/436,904.10 = 80,909.40/x
  3. Step 3: Cross multiply
    291,269.40x = 436,904.10 × 80,909.40
  4. Step 4: Simplify right side
    291,269.40x = 35,349,648,588.54
  5. Step 5: Solve for x
    x = 35,349,648,588.54/291,269.40
  6. Step 6: Final answer
    x = 121,364.10

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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.