Home / 645,738.54-891,119.04-359,258.58

Finding the Fourth Proportional to 645,738.54, 891,119.04 and 359,258.58

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Solution

The fourth proportional to 645,738.54, 891,119.04 and 359,258.58 is: 495,776.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,738.54 : 891,119.04 = 359,258.58 : x
  2. Step 2: Convert to fraction form
    645,738.54/891,119.04 = 359,258.58/x
  3. Step 3: Cross multiply
    645,738.54x = 891,119.04 × 359,258.58
  4. Step 4: Simplify right side
    645,738.54x = 320,142,160,921.36
  5. Step 5: Solve for x
    x = 320,142,160,921.36/645,738.54
  6. Step 6: Final answer
    x = 495,776.76

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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.