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Finding the Fourth Proportional to 1,435.76, 2,153.64 and 395.77

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Solution

The fourth proportional to 1,435.76, 2,153.64 and 395.77 is: 593.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.76 : 2,153.64 = 395.77 : x
  2. Step 2: Convert to fraction form
    1,435.76/2,153.64 = 395.77/x
  3. Step 3: Cross multiply
    1,435.76x = 2,153.64 × 395.77
  4. Step 4: Simplify right side
    1,435.76x = 852,346.10
  5. Step 5: Solve for x
    x = 852,346.10/1,435.76
  6. Step 6: Final answer
    x = 593.66

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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.