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Finding the Fourth Proportional to 619,795.40, 929,693.10 and 430,838.60

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Solution

The fourth proportional to 619,795.40, 929,693.10 and 430,838.60 is: 646,257.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,795.40 : 929,693.10 = 430,838.60 : x
  2. Step 2: Convert to fraction form
    619,795.40/929,693.10 = 430,838.60/x
  3. Step 3: Cross multiply
    619,795.40x = 929,693.10 × 430,838.60
  4. Step 4: Simplify right side
    619,795.40x = 400,547,673,633.66
  5. Step 5: Solve for x
    x = 400,547,673,633.66/619,795.40
  6. Step 6: Final answer
    x = 646,257.90

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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.