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Finding the Fourth Proportional to 520,059.30, 780,088.95 and 461,010.30

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Solution

The fourth proportional to 520,059.30, 780,088.95 and 461,010.30 is: 691,515.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,059.30 : 780,088.95 = 461,010.30 : x
  2. Step 2: Convert to fraction form
    520,059.30/780,088.95 = 461,010.30/x
  3. Step 3: Cross multiply
    520,059.30x = 780,088.95 × 461,010.30
  4. Step 4: Simplify right side
    520,059.30x = 359,629,040,866.19
  5. Step 5: Solve for x
    x = 359,629,040,866.19/520,059.30
  6. Step 6: Final answer
    x = 691,515.45

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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.