Home / 280,709.96-387,380.73-153,385.55

Finding the Fourth Proportional to 280,709.96, 387,380.73 and 153,385.55

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Solution

The fourth proportional to 280,709.96, 387,380.73 and 153,385.55 is: 211,672.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,709.96 : 387,380.73 = 153,385.55 : x
  2. Step 2: Convert to fraction form
    280,709.96/387,380.73 = 153,385.55/x
  3. Step 3: Cross multiply
    280,709.96x = 387,380.73 × 153,385.55
  4. Step 4: Simplify right side
    280,709.96x = 59,418,605,558.63
  5. Step 5: Solve for x
    x = 59,418,605,558.63/280,709.96
  6. Step 6: Final answer
    x = 211,672.60

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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.