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Finding the Fourth Proportional to 310,515, 428,506.89 and 174,571.62

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Solution

The fourth proportional to 310,515, 428,506.89 and 174,571.62 is: 240,906.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,515 : 428,506.89 = 174,571.62 : x
  2. Step 2: Convert to fraction form
    310,515/428,506.89 = 174,571.62/x
  3. Step 3: Cross multiply
    310,515x = 428,506.89 × 174,571.62
  4. Step 4: Simplify right side
    310,515x = 74,805,141,968.46
  5. Step 5: Solve for x
    x = 74,805,141,968.46/310,515
  6. Step 6: Final answer
    x = 240,906.69

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1.5x scale

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.