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Finding the Fourth Proportional to 889,670.88, 1,334,230.31 and 320,978.05

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Solution

The fourth proportional to 889,670.88, 1,334,230.31 and 320,978.05 is: 481,367.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,670.88 : 1,334,230.31 = 320,978.05 : x
  2. Step 2: Convert to fraction form
    889,670.88/1,334,230.31 = 320,978.05/x
  3. Step 3: Cross multiply
    889,670.88x = 1,334,230.31 × 320,978.05
  4. Step 4: Simplify right side
    889,670.88x = 428,258,643,154.70
  5. Step 5: Solve for x
    x = 428,258,643,154.70/889,670.88
  6. Step 6: Final answer
    x = 481,367.50

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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.