Home / 812,396-1,121,145-490,099.18

Finding the Fourth Proportional to 812,396, 1,121,145 and 490,099.18

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Solution

The fourth proportional to 812,396, 1,121,145 and 490,099.18 is: 676,360.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,396 : 1,121,145 = 490,099.18 : x
  2. Step 2: Convert to fraction form
    812,396/1,121,145 = 490,099.18/x
  3. Step 3: Cross multiply
    812,396x = 1,121,145 × 490,099.18
  4. Step 4: Simplify right side
    812,396x = 549,472,245,161.10
  5. Step 5: Solve for x
    x = 549,472,245,161.10/812,396
  6. Step 6: Final answer
    x = 676,360.11

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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.