Home / 688,520.30-1,030,812.15-422,799.80

Finding the Fourth Proportional to 688,520.30, 1,030,812.15 and 422,799.80

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Solution

The fourth proportional to 688,520.30, 1,030,812.15 and 422,799.80 is: 632,991.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,520.30 : 1,030,812.15 = 422,799.80 : x
  2. Step 2: Convert to fraction form
    688,520.30/1,030,812.15 = 422,799.80/x
  3. Step 3: Cross multiply
    688,520.30x = 1,030,812.15 × 422,799.80
  4. Step 4: Simplify right side
    688,520.30x = 435,827,170,857.57
  5. Step 5: Solve for x
    x = 435,827,170,857.57/688,520.30
  6. Step 6: Final answer
    x = 632,991.03

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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.