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Finding the Fourth Proportional to 890,607.40, 1,335,911.10 and 800,405.80

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Solution

The fourth proportional to 890,607.40, 1,335,911.10 and 800,405.80 is: 1,200,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,607.40 : 1,335,911.10 = 800,405.80 : x
  2. Step 2: Convert to fraction form
    890,607.40/1,335,911.10 = 800,405.80/x
  3. Step 3: Cross multiply
    890,607.40x = 1,335,911.10 × 800,405.80
  4. Step 4: Simplify right side
    890,607.40x = 1,069,270,992,724.38
  5. Step 5: Solve for x
    x = 1,069,270,992,724.38/890,607.40
  6. Step 6: Final answer
    x = 1,200,608.70

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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.