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Finding the Fourth Proportional to 430,955.61, 647,004.78 and 368,179.13

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Solution

The fourth proportional to 430,955.61, 647,004.78 and 368,179.13 is: 552,756.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,955.61 : 647,004.78 = 368,179.13 : x
  2. Step 2: Convert to fraction form
    430,955.61/647,004.78 = 368,179.13/x
  3. Step 3: Cross multiply
    430,955.61x = 647,004.78 × 368,179.13
  4. Step 4: Simplify right side
    430,955.61x = 238,213,658,623.75
  5. Step 5: Solve for x
    x = 238,213,658,623.75/430,955.61
  6. Step 6: Final answer
    x = 552,756.84

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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.