Home / 280,579.80-387,199.69-153,255.39

Finding the Fourth Proportional to 280,579.80, 387,199.69 and 153,255.39

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Solution

The fourth proportional to 280,579.80, 387,199.69 and 153,255.39 is: 211,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,579.80 : 387,199.69 = 153,255.39 : x
  2. Step 2: Convert to fraction form
    280,579.80/387,199.69 = 153,255.39/x
  3. Step 3: Cross multiply
    280,579.80x = 387,199.69 × 153,255.39
  4. Step 4: Simplify right side
    280,579.80x = 59,340,440,703.75
  5. Step 5: Solve for x
    x = 59,340,440,703.75/280,579.80
  6. Step 6: Final answer
    x = 211,492.21

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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.