Home / 811,384.76-1,217,158.24-278,835.68

Finding the Fourth Proportional to 811,384.76, 1,217,158.24 and 278,835.68

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Solution

The fourth proportional to 811,384.76, 1,217,158.24 and 278,835.68 is: 418,281.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,384.76 : 1,217,158.24 = 278,835.68 : x
  2. Step 2: Convert to fraction form
    811,384.76/1,217,158.24 = 278,835.68/x
  3. Step 3: Cross multiply
    811,384.76x = 1,217,158.24 × 278,835.68
  4. Step 4: Simplify right side
    811,384.76x = 339,387,145,518.00
  5. Step 5: Solve for x
    x = 339,387,145,518.00/811,384.76
  6. Step 6: Final answer
    x = 418,281.39

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Double scale
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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.