Home / 280,725.14-387,401.70-153,400.74

Finding the Fourth Proportional to 280,725.14, 387,401.70 and 153,400.74

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Solution

The fourth proportional to 280,725.14, 387,401.70 and 153,400.74 is: 211,693.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,725.14 : 387,401.70 = 153,400.74 : x
  2. Step 2: Convert to fraction form
    280,725.14/387,401.70 = 153,400.74/x
  3. Step 3: Cross multiply
    280,725.14x = 387,401.70 × 153,400.74
  4. Step 4: Simplify right side
    280,725.14x = 59,427,706,579.75
  5. Step 5: Solve for x
    x = 59,427,706,579.75/280,725.14
  6. Step 6: Final answer
    x = 211,693.57

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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.