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Finding the Fourth Proportional to 1,035.65, 1,553.47 and 419.35

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Solution

The fourth proportional to 1,035.65, 1,553.47 and 419.35 is: 629.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.65 : 1,553.47 = 419.35 : x
  2. Step 2: Convert to fraction form
    1,035.65/1,553.47 = 419.35/x
  3. Step 3: Cross multiply
    1,035.65x = 1,553.47 × 419.35
  4. Step 4: Simplify right side
    1,035.65x = 651,449.67
  5. Step 5: Solve for x
    x = 651,449.67/1,035.65
  6. Step 6: Final answer
    x = 629.02

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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.