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Finding the Fourth Proportional to 863,358.30, 1,295,025.30 and 390,042.90

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Solution

The fourth proportional to 863,358.30, 1,295,025.30 and 390,042.90 is: 585,058.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,358.30 : 1,295,025.30 = 390,042.90 : x
  2. Step 2: Convert to fraction form
    863,358.30/1,295,025.30 = 390,042.90/x
  3. Step 3: Cross multiply
    863,358.30x = 1,295,025.30 × 390,042.90
  4. Step 4: Simplify right side
    863,358.30x = 505,115,423,585.37
  5. Step 5: Solve for x
    x = 505,115,423,585.37/863,358.30
  6. Step 6: Final answer
    x = 585,058.86

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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.