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Finding the Fourth Proportional to 290,662.20, 407,860.20 and 290,662.20

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Solution

The fourth proportional to 290,662.20, 407,860.20 and 290,662.20 is: 407,860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,662.20 : 407,860.20 = 290,662.20 : x
  2. Step 2: Convert to fraction form
    290,662.20/407,860.20 = 290,662.20/x
  3. Step 3: Cross multiply
    290,662.20x = 407,860.20 × 290,662.20
  4. Step 4: Simplify right side
    290,662.20x = 118,549,543,024.44
  5. Step 5: Solve for x
    x = 118,549,543,024.44/290,662.20
  6. Step 6: Final answer
    x = 407,860.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.