Home / 854,123.09-1,178,633.67-491,488.41

Finding the Fourth Proportional to 854,123.09, 1,178,633.67 and 491,488.41

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Solution

The fourth proportional to 854,123.09, 1,178,633.67 and 491,488.41 is: 678,221.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    854,123.09 : 1,178,633.67 = 491,488.41 : x
  2. Step 2: Convert to fraction form
    854,123.09/1,178,633.67 = 491,488.41/x
  3. Step 3: Cross multiply
    854,123.09x = 1,178,633.67 × 491,488.41
  4. Step 4: Simplify right side
    854,123.09x = 579,284,788,440.77
  5. Step 5: Solve for x
    x = 579,284,788,440.77/854,123.09
  6. Step 6: Final answer
    x = 678,221.67

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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.