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Finding the Fourth Proportional to 989,765.12, 1,485,697.54 and 876,647.25

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Solution

The fourth proportional to 989,765.12, 1,485,697.54 and 876,647.25 is: 1,315,900.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,765.12 : 1,485,697.54 = 876,647.25 : x
  2. Step 2: Convert to fraction form
    989,765.12/1,485,697.54 = 876,647.25/x
  3. Step 3: Cross multiply
    989,765.12x = 1,485,697.54 × 876,647.25
  4. Step 4: Simplify right side
    989,765.12x = 1,302,432,660,581.15
  5. Step 5: Solve for x
    x = 1,302,432,660,581.15/989,765.12
  6. Step 6: Final answer
    x = 1,315,900.75

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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.