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Finding the Fourth Proportional to 291,851.37, 402,725.39 and 215,412.21

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Solution

The fourth proportional to 291,851.37, 402,725.39 and 215,412.21 is: 297,247.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,851.37 : 402,725.39 = 215,412.21 : x
  2. Step 2: Convert to fraction form
    291,851.37/402,725.39 = 215,412.21/x
  3. Step 3: Cross multiply
    291,851.37x = 402,725.39 × 215,412.21
  4. Step 4: Simplify right side
    291,851.37x = 86,751,965,205.95
  5. Step 5: Solve for x
    x = 86,751,965,205.95/291,851.37
  6. Step 6: Final answer
    x = 297,247.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.