Home / 491,918.76-678,868.88-274,127.67

Finding the Fourth Proportional to 491,918.76, 678,868.88 and 274,127.67

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Solution

The fourth proportional to 491,918.76, 678,868.88 and 274,127.67 is: 378,307.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,918.76 : 678,868.88 = 274,127.67 : x
  2. Step 2: Convert to fraction form
    491,918.76/678,868.88 = 274,127.67/x
  3. Step 3: Cross multiply
    491,918.76x = 678,868.88 × 274,127.67
  4. Step 4: Simplify right side
    491,918.76x = 186,096,742,939.27
  5. Step 5: Solve for x
    x = 186,096,742,939.27/491,918.76
  6. Step 6: Final answer
    x = 378,307.88

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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.