Home / 1,290,368.85-1,935,428.21-391,818.48

Finding the Fourth Proportional to 1,290,368.85, 1,935,428.21 and 391,818.48

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Solution

The fourth proportional to 1,290,368.85, 1,935,428.21 and 391,818.48 is: 587,689.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,368.85 : 1,935,428.21 = 391,818.48 : x
  2. Step 2: Convert to fraction form
    1,290,368.85/1,935,428.21 = 391,818.48/x
  3. Step 3: Cross multiply
    1,290,368.85x = 1,935,428.21 × 391,818.48
  4. Step 4: Simplify right side
    1,290,368.85x = 758,336,544,690.08
  5. Step 5: Solve for x
    x = 758,336,544,690.08/1,290,368.85
  6. Step 6: Final answer
    x = 587,689.75

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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.