Home / 812,739.60-1,219,692.60-457,376.40

Finding the Fourth Proportional to 812,739.60, 1,219,692.60 and 457,376.40

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Solution

The fourth proportional to 812,739.60, 1,219,692.60 and 457,376.40 is: 686,392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,739.60 : 1,219,692.60 = 457,376.40 : x
  2. Step 2: Convert to fraction form
    812,739.60/1,219,692.60 = 457,376.40/x
  3. Step 3: Cross multiply
    812,739.60x = 1,219,692.60 × 457,376.40
  4. Step 4: Simplify right side
    812,739.60x = 557,858,610,494.64
  5. Step 5: Solve for x
    x = 557,858,610,494.64/812,739.60
  6. Step 6: Final answer
    x = 686,392.80

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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.