Home / 690,640.40-1,035,960.60-217,470.80

Finding the Fourth Proportional to 690,640.40, 1,035,960.60 and 217,470.80

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Solution

The fourth proportional to 690,640.40, 1,035,960.60 and 217,470.80 is: 326,206.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,640.40 : 1,035,960.60 = 217,470.80 : x
  2. Step 2: Convert to fraction form
    690,640.40/1,035,960.60 = 217,470.80/x
  3. Step 3: Cross multiply
    690,640.40x = 1,035,960.60 × 217,470.80
  4. Step 4: Simplify right side
    690,640.40x = 225,291,180,450.48
  5. Step 5: Solve for x
    x = 225,291,180,450.48/690,640.40
  6. Step 6: Final answer
    x = 326,206.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.