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Finding the Fourth Proportional to 392,685.80, 589,028.70 and 363,817.40

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Solution

The fourth proportional to 392,685.80, 589,028.70 and 363,817.40 is: 545,726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,685.80 : 589,028.70 = 363,817.40 : x
  2. Step 2: Convert to fraction form
    392,685.80/589,028.70 = 363,817.40/x
  3. Step 3: Cross multiply
    392,685.80x = 589,028.70 × 363,817.40
  4. Step 4: Simplify right side
    392,685.80x = 214,298,890,159.38
  5. Step 5: Solve for x
    x = 214,298,890,159.38/392,685.80
  6. Step 6: Final answer
    x = 545,726.10

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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.