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Finding the Fourth Proportional to 270,479.20, 405,718.80 and 266,792.80

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Solution

The fourth proportional to 270,479.20, 405,718.80 and 266,792.80 is: 400,189.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,479.20 : 405,718.80 = 266,792.80 : x
  2. Step 2: Convert to fraction form
    270,479.20/405,718.80 = 266,792.80/x
  3. Step 3: Cross multiply
    270,479.20x = 405,718.80 × 266,792.80
  4. Step 4: Simplify right side
    270,479.20x = 108,242,854,664.64
  5. Step 5: Solve for x
    x = 108,242,854,664.64/270,479.20
  6. Step 6: Final answer
    x = 400,189.20

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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.