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Finding the Fourth Proportional to 614,431.60, 921,647.40 and 585,401.20

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Solution

The fourth proportional to 614,431.60, 921,647.40 and 585,401.20 is: 878,101.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,431.60 : 921,647.40 = 585,401.20 : x
  2. Step 2: Convert to fraction form
    614,431.60/921,647.40 = 585,401.20/x
  3. Step 3: Cross multiply
    614,431.60x = 921,647.40 × 585,401.20
  4. Step 4: Simplify right side
    614,431.60x = 539,533,493,936.88
  5. Step 5: Solve for x
    x = 539,533,493,936.88/614,431.60
  6. Step 6: Final answer
    x = 878,101.80

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Similar ratio
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1.5x scale

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.