Home / 1,219,642.32-1,829,754.15-420,930.78

Finding the Fourth Proportional to 1,219,642.32, 1,829,754.15 and 420,930.78

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Solution

The fourth proportional to 1,219,642.32, 1,829,754.15 and 420,930.78 is: 631,496.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,642.32 : 1,829,754.15 = 420,930.78 : x
  2. Step 2: Convert to fraction form
    1,219,642.32/1,829,754.15 = 420,930.78/x
  3. Step 3: Cross multiply
    1,219,642.32x = 1,829,754.15 × 420,930.78
  4. Step 4: Simplify right side
    1,219,642.32x = 770,199,841,567.74
  5. Step 5: Solve for x
    x = 770,199,841,567.74/1,219,642.32
  6. Step 6: Final answer
    x = 631,496.49

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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.