Home / 280,972.89-387,745.65-153,645.75

Finding the Fourth Proportional to 280,972.89, 387,745.65 and 153,645.75

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Solution

The fourth proportional to 280,972.89, 387,745.65 and 153,645.75 is: 212,032.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,972.89 : 387,745.65 = 153,645.75 : x
  2. Step 2: Convert to fraction form
    280,972.89/387,745.65 = 153,645.75/x
  3. Step 3: Cross multiply
    280,972.89x = 387,745.65 × 153,645.75
  4. Step 4: Simplify right side
    280,972.89x = 59,575,471,203.49
  5. Step 5: Solve for x
    x = 59,575,471,203.49/280,972.89
  6. Step 6: Final answer
    x = 212,032.81

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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.