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Finding the Fourth Proportional to 660,003.60, 990,005.40 and 394,064.40

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Solution

The fourth proportional to 660,003.60, 990,005.40 and 394,064.40 is: 591,096.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,003.60 : 990,005.40 = 394,064.40 : x
  2. Step 2: Convert to fraction form
    660,003.60/990,005.40 = 394,064.40/x
  3. Step 3: Cross multiply
    660,003.60x = 990,005.40 × 394,064.40
  4. Step 4: Simplify right side
    660,003.60x = 390,125,883,947.76
  5. Step 5: Solve for x
    x = 390,125,883,947.76/660,003.60
  6. Step 6: Final answer
    x = 591,096.60

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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.