Home / 688,520.80-1,030,812.90-422,800.30

Finding the Fourth Proportional to 688,520.80, 1,030,812.90 and 422,800.30

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Solution

The fourth proportional to 688,520.80, 1,030,812.90 and 422,800.30 is: 632,991.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,520.80 : 1,030,812.90 = 422,800.30 : x
  2. Step 2: Convert to fraction form
    688,520.80/1,030,812.90 = 422,800.30/x
  3. Step 3: Cross multiply
    688,520.80x = 1,030,812.90 × 422,800.30
  4. Step 4: Simplify right side
    688,520.80x = 435,828,003,363.87
  5. Step 5: Solve for x
    x = 435,828,003,363.87/688,520.80
  6. Step 6: Final answer
    x = 632,991.78

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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.