Home / 440,139.40-659,625.90-389,984.20

Finding the Fourth Proportional to 440,139.40, 659,625.90 and 389,984.20

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Solution

The fourth proportional to 440,139.40, 659,625.90 and 389,984.20 is: 584,459.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,139.40 : 659,625.90 = 389,984.20 : x
  2. Step 2: Convert to fraction form
    440,139.40/659,625.90 = 389,984.20/x
  3. Step 3: Cross multiply
    440,139.40x = 659,625.90 × 389,984.20
  4. Step 4: Simplify right side
    440,139.40x = 257,243,678,910.78
  5. Step 5: Solve for x
    x = 257,243,678,910.78/440,139.40
  6. Step 6: Final answer
    x = 584,459.56

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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.