Home / 280,640.07-387,168.60-207,228.40

Finding the Fourth Proportional to 280,640.07, 387,168.60 and 207,228.40

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Solution

The fourth proportional to 280,640.07, 387,168.60 and 207,228.40 is: 285,890.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,640.07 : 387,168.60 = 207,228.40 : x
  2. Step 2: Convert to fraction form
    280,640.07/387,168.60 = 207,228.40/x
  3. Step 3: Cross multiply
    280,640.07x = 387,168.60 × 207,228.40
  4. Step 4: Simplify right side
    280,640.07x = 80,232,329,508.24
  5. Step 5: Solve for x
    x = 80,232,329,508.24/280,640.07
  6. Step 6: Final answer
    x = 285,890.50

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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.