Home / 821,214.40-1,231,821.60-537,779.20

Finding the Fourth Proportional to 821,214.40, 1,231,821.60 and 537,779.20

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Solution

The fourth proportional to 821,214.40, 1,231,821.60 and 537,779.20 is: 806,668.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,214.40 : 1,231,821.60 = 537,779.20 : x
  2. Step 2: Convert to fraction form
    821,214.40/1,231,821.60 = 537,779.20/x
  3. Step 3: Cross multiply
    821,214.40x = 1,231,821.60 × 537,779.20
  4. Step 4: Simplify right side
    821,214.40x = 662,448,034,590.72
  5. Step 5: Solve for x
    x = 662,448,034,590.72/821,214.40
  6. Step 6: Final answer
    x = 806,668.80

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1.5x scale

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.