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Finding the Fourth Proportional to 640,742.40, 961,040.70 and 167,475.60

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Solution

The fourth proportional to 640,742.40, 961,040.70 and 167,475.60 is: 251,194.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,742.40 : 961,040.70 = 167,475.60 : x
  2. Step 2: Convert to fraction form
    640,742.40/961,040.70 = 167,475.60/x
  3. Step 3: Cross multiply
    640,742.40x = 961,040.70 × 167,475.60
  4. Step 4: Simplify right side
    640,742.40x = 160,950,867,856.92
  5. Step 5: Solve for x
    x = 160,950,867,856.92/640,742.40
  6. Step 6: Final answer
    x = 251,194.35

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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.