Home / 280,928.81-387,675.87-153,604.40

Finding the Fourth Proportional to 280,928.81, 387,675.87 and 153,604.40

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Solution

The fourth proportional to 280,928.81, 387,675.87 and 153,604.40 is: 211,970.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,928.81 : 387,675.87 = 153,604.40 : x
  2. Step 2: Convert to fraction form
    280,928.81/387,675.87 = 153,604.40/x
  3. Step 3: Cross multiply
    280,928.81x = 387,675.87 × 153,604.40
  4. Step 4: Simplify right side
    280,928.81x = 59,548,719,936.13
  5. Step 5: Solve for x
    x = 59,548,719,936.13/280,928.81
  6. Step 6: Final answer
    x = 211,970.86

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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.