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Finding the Fourth Proportional to 1,025.91, 1,539.07 and 505.89

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Solution

The fourth proportional to 1,025.91, 1,539.07 and 505.89 is: 758.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.91 : 1,539.07 = 505.89 : x
  2. Step 2: Convert to fraction form
    1,025.91/1,539.07 = 505.89/x
  3. Step 3: Cross multiply
    1,025.91x = 1,539.07 × 505.89
  4. Step 4: Simplify right side
    1,025.91x = 778,598.86
  5. Step 5: Solve for x
    x = 778,598.86/1,025.91
  6. Step 6: Final answer
    x = 758.93

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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.