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Finding the Fourth Proportional to 645,775.40, 968,663.88 and 308,736.80

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Solution

The fourth proportional to 645,775.40, 968,663.88 and 308,736.80 is: 463,105.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,775.40 : 968,663.88 = 308,736.80 : x
  2. Step 2: Convert to fraction form
    645,775.40/968,663.88 = 308,736.80/x
  3. Step 3: Cross multiply
    645,775.40x = 968,663.88 × 308,736.80
  4. Step 4: Simplify right side
    645,775.40x = 299,062,186,586.78
  5. Step 5: Solve for x
    x = 299,062,186,586.78/645,775.40
  6. Step 6: Final answer
    x = 463,105.57

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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.