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Finding the Fourth Proportional to 368,816.88, 508,962.45 and 207,687.84

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Solution

The fourth proportional to 368,816.88, 508,962.45 and 207,687.84 is: 286,606.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,816.88 : 508,962.45 = 207,687.84 : x
  2. Step 2: Convert to fraction form
    368,816.88/508,962.45 = 207,687.84/x
  3. Step 3: Cross multiply
    368,816.88x = 508,962.45 × 207,687.84
  4. Step 4: Simplify right side
    368,816.88x = 105,705,311,881.61
  5. Step 5: Solve for x
    x = 105,705,311,881.61/368,816.88
  6. Step 6: Final answer
    x = 286,606.49

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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.