Home / 811,897.20-1,217,845.80-391,215.60

Finding the Fourth Proportional to 811,897.20, 1,217,845.80 and 391,215.60

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Solution

The fourth proportional to 811,897.20, 1,217,845.80 and 391,215.60 is: 586,823.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,897.20 : 1,217,845.80 = 391,215.60 : x
  2. Step 2: Convert to fraction form
    811,897.20/1,217,845.80 = 391,215.60/x
  3. Step 3: Cross multiply
    811,897.20x = 1,217,845.80 × 391,215.60
  4. Step 4: Simplify right side
    811,897.20x = 476,440,275,354.48
  5. Step 5: Solve for x
    x = 476,440,275,354.48/811,897.20
  6. Step 6: Final answer
    x = 586,823.40

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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.