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Finding the Fourth Proportional to 478,289.75, 660,086.43 and 357,220.82

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Solution

The fourth proportional to 478,289.75, 660,086.43 and 357,220.82 is: 492,999.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,289.75 : 660,086.43 = 357,220.82 : x
  2. Step 2: Convert to fraction form
    478,289.75/660,086.43 = 357,220.82/x
  3. Step 3: Cross multiply
    478,289.75x = 660,086.43 × 357,220.82
  4. Step 4: Simplify right side
    478,289.75x = 235,796,615,795.47
  5. Step 5: Solve for x
    x = 235,796,615,795.47/478,289.75
  6. Step 6: Final answer
    x = 492,999.52

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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.