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Finding the Fourth Proportional to 641,673.20, 962,509.80 and 326,745.20

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Solution

The fourth proportional to 641,673.20, 962,509.80 and 326,745.20 is: 490,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,673.20 : 962,509.80 = 326,745.20 : x
  2. Step 2: Convert to fraction form
    641,673.20/962,509.80 = 326,745.20/x
  3. Step 3: Cross multiply
    641,673.20x = 962,509.80 × 326,745.20
  4. Step 4: Simplify right side
    641,673.20x = 314,495,457,102.96
  5. Step 5: Solve for x
    x = 314,495,457,102.96/641,673.20
  6. Step 6: Final answer
    x = 490,117.80

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Half scale
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Double scale
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Similar ratio
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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.