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Finding the Fourth Proportional to 1,085,985.40, 1,628,978.10 and 1,002,004.60

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Solution

The fourth proportional to 1,085,985.40, 1,628,978.10 and 1,002,004.60 is: 1,503,006.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085,985.40 : 1,628,978.10 = 1,002,004.60 : x
  2. Step 2: Convert to fraction form
    1,085,985.40/1,628,978.10 = 1,002,004.60/x
  3. Step 3: Cross multiply
    1,085,985.40x = 1,628,978.10 × 1,002,004.60
  4. Step 4: Simplify right side
    1,085,985.40x = 1,632,243,549,499.26
  5. Step 5: Solve for x
    x = 1,632,243,549,499.26/1,085,985.40
  6. Step 6: Final answer
    x = 1,503,006.90

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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.