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Finding the Fourth Proportional to 256,779.92, 354,355.08 and 143,603.12

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Solution

The fourth proportional to 256,779.92, 354,355.08 and 143,603.12 is: 198,171.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,779.92 : 354,355.08 = 143,603.12 : x
  2. Step 2: Convert to fraction form
    256,779.92/354,355.08 = 143,603.12/x
  3. Step 3: Cross multiply
    256,779.92x = 354,355.08 × 143,603.12
  4. Step 4: Simplify right side
    256,779.92x = 50,886,495,075.85
  5. Step 5: Solve for x
    x = 50,886,495,075.85/256,779.92
  6. Step 6: Final answer
    x = 198,171.63

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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.