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Finding the Fourth Proportional to 385,330.40, 577,995.60 and 318,845.60

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Solution

The fourth proportional to 385,330.40, 577,995.60 and 318,845.60 is: 478,268.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,330.40 : 577,995.60 = 318,845.60 : x
  2. Step 2: Convert to fraction form
    385,330.40/577,995.60 = 318,845.60/x
  3. Step 3: Cross multiply
    385,330.40x = 577,995.60 × 318,845.60
  4. Step 4: Simplify right side
    385,330.40x = 184,291,353,879.36
  5. Step 5: Solve for x
    x = 184,291,353,879.36/385,330.40
  6. Step 6: Final answer
    x = 478,268.40

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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.