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Finding the Fourth Proportional to 1,355.86, 2,034.63 and 625.49

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Solution

The fourth proportional to 1,355.86, 2,034.63 and 625.49 is: 938.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.86 : 2,034.63 = 625.49 : x
  2. Step 2: Convert to fraction form
    1,355.86/2,034.63 = 625.49/x
  3. Step 3: Cross multiply
    1,355.86x = 2,034.63 × 625.49
  4. Step 4: Simplify right side
    1,355.86x = 1,272,643.46
  5. Step 5: Solve for x
    x = 1,272,643.46/1,355.86
  6. Step 6: Final answer
    x = 938.62

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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.