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Finding the Fourth Proportional to 456,842.88, 629,316.27 and 388,641.30

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Solution

The fourth proportional to 456,842.88, 629,316.27 and 388,641.30 is: 535,366.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,842.88 : 629,316.27 = 388,641.30 : x
  2. Step 2: Convert to fraction form
    456,842.88/629,316.27 = 388,641.30/x
  3. Step 3: Cross multiply
    456,842.88x = 629,316.27 × 388,641.30
  4. Step 4: Simplify right side
    456,842.88x = 244,578,293,283.95
  5. Step 5: Solve for x
    x = 244,578,293,283.95/456,842.88
  6. Step 6: Final answer
    x = 535,366.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.