Home / 679,709.40-1,018,397.70-442,930.20

Finding the Fourth Proportional to 679,709.40, 1,018,397.70 and 442,930.20

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Solution

The fourth proportional to 679,709.40, 1,018,397.70 and 442,930.20 is: 663,635.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,709.40 : 1,018,397.70 = 442,930.20 : x
  2. Step 2: Convert to fraction form
    679,709.40/1,018,397.70 = 442,930.20/x
  3. Step 3: Cross multiply
    679,709.40x = 1,018,397.70 × 442,930.20
  4. Step 4: Simplify right side
    679,709.40x = 451,079,096,940.54
  5. Step 5: Solve for x
    x = 451,079,096,940.54/679,709.40
  6. Step 6: Final answer
    x = 663,635.22

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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.