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Finding the Fourth Proportional to 1,435.55, 2,153.30 and 785.93

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Solution

The fourth proportional to 1,435.55, 2,153.30 and 785.93 is: 1,178.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.55 : 2,153.30 = 785.93 : x
  2. Step 2: Convert to fraction form
    1,435.55/2,153.30 = 785.93/x
  3. Step 3: Cross multiply
    1,435.55x = 2,153.30 × 785.93
  4. Step 4: Simplify right side
    1,435.55x = 1,692,328.37
  5. Step 5: Solve for x
    x = 1,692,328.37/1,435.55
  6. Step 6: Final answer
    x = 1,178.88

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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.