Home / 765,284.40-1,147,408.20-390,999.60

Finding the Fourth Proportional to 765,284.40, 1,147,408.20 and 390,999.60

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Solution

The fourth proportional to 765,284.40, 1,147,408.20 and 390,999.60 is: 586,234.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,284.40 : 1,147,408.20 = 390,999.60 : x
  2. Step 2: Convert to fraction form
    765,284.40/1,147,408.20 = 390,999.60/x
  3. Step 3: Cross multiply
    765,284.40x = 1,147,408.20 × 390,999.60
  4. Step 4: Simplify right side
    765,284.40x = 448,636,147,236.72
  5. Step 5: Solve for x
    x = 448,636,147,236.72/765,284.40
  6. Step 6: Final answer
    x = 586,234.54

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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.