Home / 642,430.20-963,103.41-405,250.05

Finding the Fourth Proportional to 642,430.20, 963,103.41 and 405,250.05

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Solution

The fourth proportional to 642,430.20, 963,103.41 and 405,250.05 is: 607,533.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,430.20 : 963,103.41 = 405,250.05 : x
  2. Step 2: Convert to fraction form
    642,430.20/963,103.41 = 405,250.05/x
  3. Step 3: Cross multiply
    642,430.20x = 963,103.41 × 405,250.05
  4. Step 4: Simplify right side
    642,430.20x = 390,297,705,057.67
  5. Step 5: Solve for x
    x = 390,297,705,057.67/642,430.20
  6. Step 6: Final answer
    x = 607,533.25

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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.