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Finding the Fourth Proportional to 554,030.80, 764,851.60 and 393,269.90

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Solution

The fourth proportional to 554,030.80, 764,851.60 and 393,269.90 is: 542,917.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,030.80 : 764,851.60 = 393,269.90 : x
  2. Step 2: Convert to fraction form
    554,030.80/764,851.60 = 393,269.90/x
  3. Step 3: Cross multiply
    554,030.80x = 764,851.60 × 393,269.90
  4. Step 4: Simplify right side
    554,030.80x = 300,793,111,004.32
  5. Step 5: Solve for x
    x = 300,793,111,004.32/554,030.80
  6. Step 6: Final answer
    x = 542,917.67

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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.