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Finding the Fourth Proportional to 663,749.40, 995,040.90 and 397,615.80

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Solution

The fourth proportional to 663,749.40, 995,040.90 and 397,615.80 is: 596,074.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,749.40 : 995,040.90 = 397,615.80 : x
  2. Step 2: Convert to fraction form
    663,749.40/995,040.90 = 397,615.80/x
  3. Step 3: Cross multiply
    663,749.40x = 995,040.90 × 397,615.80
  4. Step 4: Simplify right side
    663,749.40x = 395,643,983,486.22
  5. Step 5: Solve for x
    x = 395,643,983,486.22/663,749.40
  6. Step 6: Final answer
    x = 596,074.34

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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.