Home / 785,488.79-1,178,325.42-280,121.60

Finding the Fourth Proportional to 785,488.79, 1,178,325.42 and 280,121.60

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Solution

The fourth proportional to 785,488.79, 1,178,325.42 and 280,121.60 is: 420,215.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    785,488.79 : 1,178,325.42 = 280,121.60 : x
  2. Step 2: Convert to fraction form
    785,488.79/1,178,325.42 = 280,121.60/x
  3. Step 3: Cross multiply
    785,488.79x = 1,178,325.42 × 280,121.60
  4. Step 4: Simplify right side
    785,488.79x = 330,074,404,916.89
  5. Step 5: Solve for x
    x = 330,074,404,916.89/785,488.79
  6. Step 6: Final answer
    x = 420,215.30

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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.