Home / 1,028,755.79-1,420,376.21-642,159.80

Finding the Fourth Proportional to 1,028,755.79, 1,420,376.21 and 642,159.80

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Solution

The fourth proportional to 1,028,755.79, 1,420,376.21 and 642,159.80 is: 886,613.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028,755.79 : 1,420,376.21 = 642,159.80 : x
  2. Step 2: Convert to fraction form
    1,028,755.79/1,420,376.21 = 642,159.80/x
  3. Step 3: Cross multiply
    1,028,755.79x = 1,420,376.21 × 642,159.80
  4. Step 4: Simplify right side
    1,028,755.79x = 912,108,500,360.19
  5. Step 5: Solve for x
    x = 912,108,500,360.19/1,028,755.79
  6. Step 6: Final answer
    x = 886,613.24

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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.