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Finding the Fourth Proportional to 768,750.40, 1,150,015.20 and 675,438.40

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Solution

The fourth proportional to 768,750.40, 1,150,015.20 and 675,438.40 is: 1,010,424.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,750.40 : 1,150,015.20 = 675,438.40 : x
  2. Step 2: Convert to fraction form
    768,750.40/1,150,015.20 = 675,438.40/x
  3. Step 3: Cross multiply
    768,750.40x = 1,150,015.20 × 675,438.40
  4. Step 4: Simplify right side
    768,750.40x = 776,764,426,663.68
  5. Step 5: Solve for x
    x = 776,764,426,663.68/768,750.40
  6. Step 6: Final answer
    x = 1,010,424.74

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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.