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Finding the Fourth Proportional to 443,783.40, 665,237.70 and 218,959.80

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Solution

The fourth proportional to 443,783.40, 665,237.70 and 218,959.80 is: 328,223.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,783.40 : 665,237.70 = 218,959.80 : x
  2. Step 2: Convert to fraction form
    443,783.40/665,237.70 = 218,959.80/x
  3. Step 3: Cross multiply
    443,783.40x = 665,237.70 × 218,959.80
  4. Step 4: Simplify right side
    443,783.40x = 145,660,313,744.46
  5. Step 5: Solve for x
    x = 145,660,313,744.46/443,783.40
  6. Step 6: Final answer
    x = 328,223.89

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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.