Home / 642,494.20-963,198.06-405,315.40

Finding the Fourth Proportional to 642,494.20, 963,198.06 and 405,315.40

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Solution

The fourth proportional to 642,494.20, 963,198.06 and 405,315.40 is: 607,630.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,494.20 : 963,198.06 = 405,315.40 : x
  2. Step 2: Convert to fraction form
    642,494.20/963,198.06 = 405,315.40/x
  3. Step 3: Cross multiply
    642,494.20x = 963,198.06 × 405,315.40
  4. Step 4: Simplify right side
    642,494.20x = 390,399,006,968.12
  5. Step 5: Solve for x
    x = 390,399,006,968.12/642,494.20
  6. Step 6: Final answer
    x = 607,630.40

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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.