Home / 854,012.34-1,178,654.22-491,428.80

Finding the Fourth Proportional to 854,012.34, 1,178,654.22 and 491,428.80

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Solution

The fourth proportional to 854,012.34, 1,178,654.22 and 491,428.80 is: 678,239.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    854,012.34 : 1,178,654.22 = 491,428.80 : x
  2. Step 2: Convert to fraction form
    854,012.34/1,178,654.22 = 491,428.80/x
  3. Step 3: Cross multiply
    854,012.34x = 1,178,654.22 × 491,428.80
  4. Step 4: Simplify right side
    854,012.34x = 579,224,628,949.54
  5. Step 5: Solve for x
    x = 579,224,628,949.54/854,012.34
  6. Step 6: Final answer
    x = 678,239.18

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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.