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Finding the Fourth Proportional to 256,303.32, 353,699.34 and 143,130.36

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Solution

The fourth proportional to 256,303.32, 353,699.34 and 143,130.36 is: 197,520.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,303.32 : 353,699.34 = 143,130.36 : x
  2. Step 2: Convert to fraction form
    256,303.32/353,699.34 = 143,130.36/x
  3. Step 3: Cross multiply
    256,303.32x = 353,699.34 × 143,130.36
  4. Step 4: Simplify right side
    256,303.32x = 50,625,113,865.96
  5. Step 5: Solve for x
    x = 50,625,113,865.96/256,303.32
  6. Step 6: Final answer
    x = 197,520.32

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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.