Home / 1,391,646.65-1,920,439.80-818,723.66

Finding the Fourth Proportional to 1,391,646.65, 1,920,439.80 and 818,723.66

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Solution

The fourth proportional to 1,391,646.65, 1,920,439.80 and 818,723.66 is: 1,129,819.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,646.65 : 1,920,439.80 = 818,723.66 : x
  2. Step 2: Convert to fraction form
    1,391,646.65/1,920,439.80 = 818,723.66/x
  3. Step 3: Cross multiply
    1,391,646.65x = 1,920,439.80 × 818,723.66
  4. Step 4: Simplify right side
    1,391,646.65x = 1,572,309,492,263.47
  5. Step 5: Solve for x
    x = 1,572,309,492,263.47/1,391,646.65
  6. Step 6: Final answer
    x = 1,129,819.48

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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.