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Finding the Fourth Proportional to 393,659.20, 590,488.80 and 314,927.20

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Solution

The fourth proportional to 393,659.20, 590,488.80 and 314,927.20 is: 472,390.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,659.20 : 590,488.80 = 314,927.20 : x
  2. Step 2: Convert to fraction form
    393,659.20/590,488.80 = 314,927.20/x
  3. Step 3: Cross multiply
    393,659.20x = 590,488.80 × 314,927.20
  4. Step 4: Simplify right side
    393,659.20x = 185,960,984,415.36
  5. Step 5: Solve for x
    x = 185,960,984,415.36/393,659.20
  6. Step 6: Final answer
    x = 472,390.80

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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.