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Finding the Fourth Proportional to 515,458.50, 711,643.77 and 336,921.54

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Solution

The fourth proportional to 515,458.50, 711,643.77 and 336,921.54 is: 465,155.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,458.50 : 711,643.77 = 336,921.54 : x
  2. Step 2: Convert to fraction form
    515,458.50/711,643.77 = 336,921.54/x
  3. Step 3: Cross multiply
    515,458.50x = 711,643.77 × 336,921.54
  4. Step 4: Simplify right side
    515,458.50x = 239,768,114,919.81
  5. Step 5: Solve for x
    x = 239,768,114,919.81/515,458.50
  6. Step 6: Final answer
    x = 465,155.03

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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.