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Finding the Fourth Proportional to 519,497.70, 779,246.55 and 430,851.30

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Solution

The fourth proportional to 519,497.70, 779,246.55 and 430,851.30 is: 646,276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,497.70 : 779,246.55 = 430,851.30 : x
  2. Step 2: Convert to fraction form
    519,497.70/779,246.55 = 430,851.30/x
  3. Step 3: Cross multiply
    519,497.70x = 779,246.55 × 430,851.30
  4. Step 4: Simplify right side
    519,497.70x = 335,739,389,088.02
  5. Step 5: Solve for x
    x = 335,739,389,088.02/519,497.70
  6. Step 6: Final answer
    x = 646,276.95

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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.