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Finding the Fourth Proportional to 553,526.40, 830,289.60 and 455,111.40

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Solution

The fourth proportional to 553,526.40, 830,289.60 and 455,111.40 is: 682,667.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,526.40 : 830,289.60 = 455,111.40 : x
  2. Step 2: Convert to fraction form
    553,526.40/830,289.60 = 455,111.40/x
  3. Step 3: Cross multiply
    553,526.40x = 830,289.60 × 455,111.40
  4. Step 4: Simplify right side
    553,526.40x = 377,874,262,261.44
  5. Step 5: Solve for x
    x = 377,874,262,261.44/553,526.40
  6. Step 6: Final answer
    x = 682,667.10

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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.