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Finding the Fourth Proportional to 619,256.70, 928,885.05 and 554,302.80

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Solution

The fourth proportional to 619,256.70, 928,885.05 and 554,302.80 is: 831,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,256.70 : 928,885.05 = 554,302.80 : x
  2. Step 2: Convert to fraction form
    619,256.70/928,885.05 = 554,302.80/x
  3. Step 3: Cross multiply
    619,256.70x = 928,885.05 × 554,302.80
  4. Step 4: Simplify right side
    619,256.70x = 514,883,584,093.14
  5. Step 5: Solve for x
    x = 514,883,584,093.14/619,256.70
  6. Step 6: Final answer
    x = 831,454.20

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Double scale
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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.