Home / 1,319,369.18-1,979,242.43-420,821.12

Finding the Fourth Proportional to 1,319,369.18, 1,979,242.43 and 420,821.12

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Solution

The fourth proportional to 1,319,369.18, 1,979,242.43 and 420,821.12 is: 631,291.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,369.18 : 1,979,242.43 = 420,821.12 : x
  2. Step 2: Convert to fraction form
    1,319,369.18/1,979,242.43 = 420,821.12/x
  3. Step 3: Cross multiply
    1,319,369.18x = 1,979,242.43 × 420,821.12
  4. Step 4: Simplify right side
    1,319,369.18x = 832,907,018,988.12
  5. Step 5: Solve for x
    x = 832,907,018,988.12/1,319,369.18
  6. Step 6: Final answer
    x = 631,291.86

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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.