Home / 812,989.26-1,121,298.96-490,363.02

Finding the Fourth Proportional to 812,989.26, 1,121,298.96 and 490,363.02

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Solution

The fourth proportional to 812,989.26, 1,121,298.96 and 490,363.02 is: 676,323.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,989.26 : 1,121,298.96 = 490,363.02 : x
  2. Step 2: Convert to fraction form
    812,989.26/1,121,298.96 = 490,363.02/x
  3. Step 3: Cross multiply
    812,989.26x = 1,121,298.96 × 490,363.02
  4. Step 4: Simplify right side
    812,989.26x = 549,843,544,348.46
  5. Step 5: Solve for x
    x = 549,843,544,348.46/812,989.26
  6. Step 6: Final answer
    x = 676,323.26

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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.