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Finding the Fourth Proportional to 620,010.72, 855,874.80 and 419,078.88

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Solution

The fourth proportional to 620,010.72, 855,874.80 and 419,078.88 is: 578,504.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,010.72 : 855,874.80 = 419,078.88 : x
  2. Step 2: Convert to fraction form
    620,010.72/855,874.80 = 419,078.88/x
  3. Step 3: Cross multiply
    620,010.72x = 855,874.80 × 419,078.88
  4. Step 4: Simplify right side
    620,010.72x = 358,679,052,604.22
  5. Step 5: Solve for x
    x = 358,679,052,604.22/620,010.72
  6. Step 6: Final answer
    x = 578,504.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.