Home / 1,214,056.80-1,821,085.20-647,186.40

Finding the Fourth Proportional to 1,214,056.80, 1,821,085.20 and 647,186.40

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Solution

The fourth proportional to 1,214,056.80, 1,821,085.20 and 647,186.40 is: 970,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,056.80 : 1,821,085.20 = 647,186.40 : x
  2. Step 2: Convert to fraction form
    1,214,056.80/1,821,085.20 = 647,186.40/x
  3. Step 3: Cross multiply
    1,214,056.80x = 1,821,085.20 × 647,186.40
  4. Step 4: Simplify right side
    1,214,056.80x = 1,178,581,574,681.28
  5. Step 5: Solve for x
    x = 1,178,581,574,681.28/1,214,056.80
  6. Step 6: Final answer
    x = 970,779.60

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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.