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Finding the Fourth Proportional to 889,805.20, 1,335,145.20 and 416,408.80

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Solution

The fourth proportional to 889,805.20, 1,335,145.20 and 416,408.80 is: 624,817.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,805.20 : 1,335,145.20 = 416,408.80 : x
  2. Step 2: Convert to fraction form
    889,805.20/1,335,145.20 = 416,408.80/x
  3. Step 3: Cross multiply
    889,805.20x = 1,335,145.20 × 416,408.80
  4. Step 4: Simplify right side
    889,805.20x = 555,966,210,557.76
  5. Step 5: Solve for x
    x = 555,966,210,557.76/889,805.20
  6. Step 6: Final answer
    x = 624,817.89

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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.