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Finding the Fourth Proportional to 712,930.01, 983,843.28 and 390,652.20

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Solution

The fourth proportional to 712,930.01, 983,843.28 and 390,652.20 is: 539,099.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,930.01 : 983,843.28 = 390,652.20 : x
  2. Step 2: Convert to fraction form
    712,930.01/983,843.28 = 390,652.20/x
  3. Step 3: Cross multiply
    712,930.01x = 983,843.28 × 390,652.20
  4. Step 4: Simplify right side
    712,930.01x = 384,340,541,787.22
  5. Step 5: Solve for x
    x = 384,340,541,787.22/712,930.01
  6. Step 6: Final answer
    x = 539,099.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.