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Finding the Fourth Proportional to 291,152.12, 436,728.40 and 80,790.26

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Solution

The fourth proportional to 291,152.12, 436,728.40 and 80,790.26 is: 121,185.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,152.12 : 436,728.40 = 80,790.26 : x
  2. Step 2: Convert to fraction form
    291,152.12/436,728.40 = 80,790.26/x
  3. Step 3: Cross multiply
    291,152.12x = 436,728.40 × 80,790.26
  4. Step 4: Simplify right side
    291,152.12x = 35,283,400,985.38
  5. Step 5: Solve for x
    x = 35,283,400,985.38/291,152.12
  6. Step 6: Final answer
    x = 121,185.45

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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.