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Finding the Fourth Proportional to 619,811.40, 929,717.10 and 430,854.60

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Solution

The fourth proportional to 619,811.40, 929,717.10 and 430,854.60 is: 646,281.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,811.40 : 929,717.10 = 430,854.60 : x
  2. Step 2: Convert to fraction form
    619,811.40/929,717.10 = 430,854.60/x
  3. Step 3: Cross multiply
    619,811.40x = 929,717.10 × 430,854.60
  4. Step 4: Simplify right side
    619,811.40x = 400,572,889,233.66
  5. Step 5: Solve for x
    x = 400,572,889,233.66/619,811.40
  6. Step 6: Final answer
    x = 646,281.90

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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.