Home / 679,697.40-1,018,379.70-442,918.20

Finding the Fourth Proportional to 679,697.40, 1,018,379.70 and 442,918.20

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Solution

The fourth proportional to 679,697.40, 1,018,379.70 and 442,918.20 is: 663,617.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,697.40 : 1,018,379.70 = 442,918.20 : x
  2. Step 2: Convert to fraction form
    679,697.40/1,018,379.70 = 442,918.20/x
  3. Step 3: Cross multiply
    679,697.40x = 1,018,379.70 × 442,918.20
  4. Step 4: Simplify right side
    679,697.40x = 451,058,903,640.54
  5. Step 5: Solve for x
    x = 451,058,903,640.54/679,697.40
  6. Step 6: Final answer
    x = 663,617.23

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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.