Home / 812,730.40-1,215,639.60-729,095.20

Finding the Fourth Proportional to 812,730.40, 1,215,639.60 and 729,095.20

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Solution

The fourth proportional to 812,730.40, 1,215,639.60 and 729,095.20 is: 1,090,542.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,730.40 : 1,215,639.60 = 729,095.20 : x
  2. Step 2: Convert to fraction form
    812,730.40/1,215,639.60 = 729,095.20/x
  3. Step 3: Cross multiply
    812,730.40x = 1,215,639.60 × 729,095.20
  4. Step 4: Simplify right side
    812,730.40x = 886,316,997,289.92
  5. Step 5: Solve for x
    x = 886,316,997,289.92/812,730.40
  6. Step 6: Final answer
    x = 1,090,542.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.