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Finding the Fourth Proportional to 291,228.40, 436,842.60 and 80,868.40

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Solution

The fourth proportional to 291,228.40, 436,842.60 and 80,868.40 is: 121,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,228.40 : 436,842.60 = 80,868.40 : x
  2. Step 2: Convert to fraction form
    291,228.40/436,842.60 = 80,868.40/x
  3. Step 3: Cross multiply
    291,228.40x = 436,842.60 × 80,868.40
  4. Step 4: Simplify right side
    291,228.40x = 35,326,762,113.84
  5. Step 5: Solve for x
    x = 35,326,762,113.84/291,228.40
  6. Step 6: Final answer
    x = 121,302.60

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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.