Home / 1,120,207.60-1,680,311.40-639,942.40

Finding the Fourth Proportional to 1,120,207.60, 1,680,311.40 and 639,942.40

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Solution

The fourth proportional to 1,120,207.60, 1,680,311.40 and 639,942.40 is: 959,913.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,207.60 : 1,680,311.40 = 639,942.40 : x
  2. Step 2: Convert to fraction form
    1,120,207.60/1,680,311.40 = 639,942.40/x
  3. Step 3: Cross multiply
    1,120,207.60x = 1,680,311.40 × 639,942.40
  4. Step 4: Simplify right side
    1,120,207.60x = 1,075,302,510,063.36
  5. Step 5: Solve for x
    x = 1,075,302,510,063.36/1,120,207.60
  6. Step 6: Final answer
    x = 959,913.60

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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.