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Finding the Fourth Proportional to 419,312.40, 578,635.44 and 256,241.58

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Solution

The fourth proportional to 419,312.40, 578,635.44 and 256,241.58 is: 353,603.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,312.40 : 578,635.44 = 256,241.58 : x
  2. Step 2: Convert to fraction form
    419,312.40/578,635.44 = 256,241.58/x
  3. Step 3: Cross multiply
    419,312.40x = 578,635.44 × 256,241.58
  4. Step 4: Simplify right side
    419,312.40x = 148,270,459,389.60
  5. Step 5: Solve for x
    x = 148,270,459,389.60/419,312.40
  6. Step 6: Final answer
    x = 353,603.80

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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.