Home / 812,355.28-1,121,085.32-449,779.15

Finding the Fourth Proportional to 812,355.28, 1,121,085.32 and 449,779.15

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Solution

The fourth proportional to 812,355.28, 1,121,085.32 and 449,779.15 is: 620,714.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,355.28 : 1,121,085.32 = 449,779.15 : x
  2. Step 2: Convert to fraction form
    812,355.28/1,121,085.32 = 449,779.15/x
  3. Step 3: Cross multiply
    812,355.28x = 1,121,085.32 × 449,779.15
  4. Step 4: Simplify right side
    812,355.28x = 504,240,802,307.08
  5. Step 5: Solve for x
    x = 504,240,802,307.08/812,355.28
  6. Step 6: Final answer
    x = 620,714.62

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1.5x scale

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.