Home / 1,214,000.80-1,821,001.20-647,130.40

Finding the Fourth Proportional to 1,214,000.80, 1,821,001.20 and 647,130.40

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Solution

The fourth proportional to 1,214,000.80, 1,821,001.20 and 647,130.40 is: 970,695.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,000.80 : 1,821,001.20 = 647,130.40 : x
  2. Step 2: Convert to fraction form
    1,214,000.80/1,821,001.20 = 647,130.40/x
  3. Step 3: Cross multiply
    1,214,000.80x = 1,821,001.20 × 647,130.40
  4. Step 4: Simplify right side
    1,214,000.80x = 1,178,425,234,956.48
  5. Step 5: Solve for x
    x = 1,178,425,234,956.48/1,214,000.80
  6. Step 6: Final answer
    x = 970,695.60

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Double scale
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Similar ratio
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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.