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Finding the Fourth Proportional to 384,944.40, 577,416.60 and 118,681.20

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Solution

The fourth proportional to 384,944.40, 577,416.60 and 118,681.20 is: 178,021.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,944.40 : 577,416.60 = 118,681.20 : x
  2. Step 2: Convert to fraction form
    384,944.40/577,416.60 = 118,681.20/x
  3. Step 3: Cross multiply
    384,944.40x = 577,416.60 × 118,681.20
  4. Step 4: Simplify right side
    384,944.40x = 68,528,494,987.92
  5. Step 5: Solve for x
    x = 68,528,494,987.92/384,944.40
  6. Step 6: Final answer
    x = 178,021.80

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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.