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Finding the Fourth Proportional to 439,323.40, 658,466.70 and 328,385.80

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Solution

The fourth proportional to 439,323.40, 658,466.70 and 328,385.80 is: 492,191.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,323.40 : 658,466.70 = 328,385.80 : x
  2. Step 2: Convert to fraction form
    439,323.40/658,466.70 = 328,385.80/x
  3. Step 3: Cross multiply
    439,323.40x = 658,466.70 × 328,385.80
  4. Step 4: Simplify right side
    439,323.40x = 216,231,114,052.86
  5. Step 5: Solve for x
    x = 216,231,114,052.86/439,323.40
  6. Step 6: Final answer
    x = 492,191.21

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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.