Home / 780,008.40-1,170,012.60-509,403.60

Finding the Fourth Proportional to 780,008.40, 1,170,012.60 and 509,403.60

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Solution

The fourth proportional to 780,008.40, 1,170,012.60 and 509,403.60 is: 764,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,008.40 : 1,170,012.60 = 509,403.60 : x
  2. Step 2: Convert to fraction form
    780,008.40/1,170,012.60 = 509,403.60/x
  3. Step 3: Cross multiply
    780,008.40x = 1,170,012.60 × 509,403.60
  4. Step 4: Simplify right side
    780,008.40x = 596,008,630,485.36
  5. Step 5: Solve for x
    x = 596,008,630,485.36/780,008.40
  6. Step 6: Final answer
    x = 764,105.40

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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.