Home / 786,668.76-1,085,285.79-455,306.67

Finding the Fourth Proportional to 786,668.76, 1,085,285.79 and 455,306.67

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Solution

The fourth proportional to 786,668.76, 1,085,285.79 and 455,306.67 is: 628,139.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,668.76 : 1,085,285.79 = 455,306.67 : x
  2. Step 2: Convert to fraction form
    786,668.76/1,085,285.79 = 455,306.67/x
  3. Step 3: Cross multiply
    786,668.76x = 1,085,285.79 × 455,306.67
  4. Step 4: Simplify right side
    786,668.76x = 494,137,859,043.22
  5. Step 5: Solve for x
    x = 494,137,859,043.22/786,668.76
  6. Step 6: Final answer
    x = 628,139.67

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.