Home / 1,386,296.86-1,915,720.20-1,000,378.84

Finding the Fourth Proportional to 1,386,296.86, 1,915,720.20 and 1,000,378.84

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Solution

The fourth proportional to 1,386,296.86, 1,915,720.20 and 1,000,378.84 is: 1,382,421.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,296.86 : 1,915,720.20 = 1,000,378.84 : x
  2. Step 2: Convert to fraction form
    1,386,296.86/1,915,720.20 = 1,000,378.84/x
  3. Step 3: Cross multiply
    1,386,296.86x = 1,915,720.20 × 1,000,378.84
  4. Step 4: Simplify right side
    1,386,296.86x = 1,916,445,951,440.57
  5. Step 5: Solve for x
    x = 1,916,445,951,440.57/1,386,296.86
  6. Step 6: Final answer
    x = 1,382,421.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.