Home / 828,142.40-1,142,809.92-465,581.48

Finding the Fourth Proportional to 828,142.40, 1,142,809.92 and 465,581.48

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Solution

The fourth proportional to 828,142.40, 1,142,809.92 and 465,581.48 is: 642,487.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,142.40 : 1,142,809.92 = 465,581.48 : x
  2. Step 2: Convert to fraction form
    828,142.40/1,142,809.92 = 465,581.48/x
  3. Step 3: Cross multiply
    828,142.40x = 1,142,809.92 × 465,581.48
  4. Step 4: Simplify right side
    828,142.40x = 532,071,133,912.28
  5. Step 5: Solve for x
    x = 532,071,133,912.28/828,142.40
  6. Step 6: Final answer
    x = 642,487.49

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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.