Home / 1,380,689.28-1,905,289.92-768,873.60

Finding the Fourth Proportional to 1,380,689.28, 1,905,289.92 and 768,873.60

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Solution

The fourth proportional to 1,380,689.28, 1,905,289.92 and 768,873.60 is: 1,061,011.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,689.28 : 1,905,289.92 = 768,873.60 : x
  2. Step 2: Convert to fraction form
    1,380,689.28/1,905,289.92 = 768,873.60/x
  3. Step 3: Cross multiply
    1,380,689.28x = 1,905,289.92 × 768,873.60
  4. Step 4: Simplify right side
    1,380,689.28x = 1,464,927,119,834.11
  5. Step 5: Solve for x
    x = 1,464,927,119,834.11/1,380,689.28
  6. Step 6: Final answer
    x = 1,061,011.44

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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.