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Finding the Fourth Proportional to 403,336.80, 605,005.20 and 308,858.40

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Solution

The fourth proportional to 403,336.80, 605,005.20 and 308,858.40 is: 463,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,336.80 : 605,005.20 = 308,858.40 : x
  2. Step 2: Convert to fraction form
    403,336.80/605,005.20 = 308,858.40/x
  3. Step 3: Cross multiply
    403,336.80x = 605,005.20 × 308,858.40
  4. Step 4: Simplify right side
    403,336.80x = 186,860,938,063.68
  5. Step 5: Solve for x
    x = 186,860,938,063.68/403,336.80
  6. Step 6: Final answer
    x = 463,287.60

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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.