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Finding the Fourth Proportional to 280,745.36, 387,383.81 and 159,888.90

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Solution

The fourth proportional to 280,745.36, 387,383.81 and 159,888.90 is: 220,621.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,745.36 : 387,383.81 = 159,888.90 : x
  2. Step 2: Convert to fraction form
    280,745.36/387,383.81 = 159,888.90/x
  3. Step 3: Cross multiply
    280,745.36x = 387,383.81 × 159,888.90
  4. Step 4: Simplify right side
    280,745.36x = 61,938,370,459.26
  5. Step 5: Solve for x
    x = 61,938,370,459.26/280,745.36
  6. Step 6: Final answer
    x = 220,621.18

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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.