Home / 1,290,422.15-1,935,636.29-391,870.64

Finding the Fourth Proportional to 1,290,422.15, 1,935,636.29 and 391,870.64

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Solution

The fourth proportional to 1,290,422.15, 1,935,636.29 and 391,870.64 is: 587,806.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,422.15 : 1,935,636.29 = 391,870.64 : x
  2. Step 2: Convert to fraction form
    1,290,422.15/1,935,636.29 = 391,870.64/x
  3. Step 3: Cross multiply
    1,290,422.15x = 1,935,636.29 × 391,870.64
  4. Step 4: Simplify right side
    1,290,422.15x = 758,519,031,769.53
  5. Step 5: Solve for x
    x = 758,519,031,769.53/1,290,422.15
  6. Step 6: Final answer
    x = 587,806.89

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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.