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Finding the Fourth Proportional to 392,359.80, 588,539.70 and 313,627.80

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Solution

The fourth proportional to 392,359.80, 588,539.70 and 313,627.80 is: 470,441.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,359.80 : 588,539.70 = 313,627.80 : x
  2. Step 2: Convert to fraction form
    392,359.80/588,539.70 = 313,627.80/x
  3. Step 3: Cross multiply
    392,359.80x = 588,539.70 × 313,627.80
  4. Step 4: Simplify right side
    392,359.80x = 184,582,411,323.66
  5. Step 5: Solve for x
    x = 184,582,411,323.66/392,359.80
  6. Step 6: Final answer
    x = 470,441.70

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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.