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Finding the Fourth Proportional to 863,601.30, 1,295,389.80 and 390,285.90

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Solution

The fourth proportional to 863,601.30, 1,295,389.80 and 390,285.90 is: 585,423.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,601.30 : 1,295,389.80 = 390,285.90 : x
  2. Step 2: Convert to fraction form
    863,601.30/1,295,389.80 = 390,285.90/x
  3. Step 3: Cross multiply
    863,601.30x = 1,295,389.80 × 390,285.90
  4. Step 4: Simplify right side
    863,601.30x = 505,572,373,943.82
  5. Step 5: Solve for x
    x = 505,572,373,943.82/863,601.30
  6. Step 6: Final answer
    x = 585,423.36

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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.