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Finding the Fourth Proportional to 680,826.56, 939,652.88 and 519,376.80

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Solution

The fourth proportional to 680,826.56, 939,652.88 and 519,376.80 is: 716,825.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,826.56 : 939,652.88 = 519,376.80 : x
  2. Step 2: Convert to fraction form
    680,826.56/939,652.88 = 519,376.80/x
  3. Step 3: Cross multiply
    680,826.56x = 939,652.88 × 519,376.80
  4. Step 4: Simplify right side
    680,826.56x = 488,033,905,925.18
  5. Step 5: Solve for x
    x = 488,033,905,925.18/680,826.56
  6. Step 6: Final answer
    x = 716,825.60

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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.