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Finding the Fourth Proportional to 876,064.80, 1,313,125.20 and 343,408.80

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Solution

The fourth proportional to 876,064.80, 1,313,125.20 and 343,408.80 is: 514,732.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,064.80 : 1,313,125.20 = 343,408.80 : x
  2. Step 2: Convert to fraction form
    876,064.80/1,313,125.20 = 343,408.80/x
  3. Step 3: Cross multiply
    876,064.80x = 1,313,125.20 × 343,408.80
  4. Step 4: Simplify right side
    876,064.80x = 450,938,749,181.76
  5. Step 5: Solve for x
    x = 450,938,749,181.76/876,064.80
  6. Step 6: Final answer
    x = 514,732.19

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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.