Home / 280,628.90-387,378.70-173,242.34

Finding the Fourth Proportional to 280,628.90, 387,378.70 and 173,242.34

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Solution

The fourth proportional to 280,628.90, 387,378.70 and 173,242.34 is: 239,142.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,628.90 : 387,378.70 = 173,242.34 : x
  2. Step 2: Convert to fraction form
    280,628.90/387,378.70 = 173,242.34/x
  3. Step 3: Cross multiply
    280,628.90x = 387,378.70 × 173,242.34
  4. Step 4: Simplify right side
    280,628.90x = 67,110,392,454.16
  5. Step 5: Solve for x
    x = 67,110,392,454.16/280,628.90
  6. Step 6: Final answer
    x = 239,142.84

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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.