Home / 678,668.20-1,018,002.30-426,725.80

Finding the Fourth Proportional to 678,668.20, 1,018,002.30 and 426,725.80

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Solution

The fourth proportional to 678,668.20, 1,018,002.30 and 426,725.80 is: 640,088.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,668.20 : 1,018,002.30 = 426,725.80 : x
  2. Step 2: Convert to fraction form
    678,668.20/1,018,002.30 = 426,725.80/x
  3. Step 3: Cross multiply
    678,668.20x = 1,018,002.30 × 426,725.80
  4. Step 4: Simplify right side
    678,668.20x = 434,407,845,869.34
  5. Step 5: Solve for x
    x = 434,407,845,869.34/678,668.20
  6. Step 6: Final answer
    x = 640,088.70

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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.