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Finding the Fourth Proportional to 404,941.60, 607,412.40 and 398,720.80

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Solution

The fourth proportional to 404,941.60, 607,412.40 and 398,720.80 is: 598,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,941.60 : 607,412.40 = 398,720.80 : x
  2. Step 2: Convert to fraction form
    404,941.60/607,412.40 = 398,720.80/x
  3. Step 3: Cross multiply
    404,941.60x = 607,412.40 × 398,720.80
  4. Step 4: Simplify right side
    404,941.60x = 242,187,958,057.92
  5. Step 5: Solve for x
    x = 242,187,958,057.92/404,941.60
  6. Step 6: Final answer
    x = 598,081.20

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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.