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Finding the Fourth Proportional to 1,435.90, 1,981.92 and 846.63

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Solution

The fourth proportional to 1,435.90, 1,981.92 and 846.63 is: 1,168.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.90 : 1,981.92 = 846.63 : x
  2. Step 2: Convert to fraction form
    1,435.90/1,981.92 = 846.63/x
  3. Step 3: Cross multiply
    1,435.90x = 1,981.92 × 846.63
  4. Step 4: Simplify right side
    1,435.90x = 1,677,952.93
  5. Step 5: Solve for x
    x = 1,677,952.93/1,435.90
  6. Step 6: Final answer
    x = 1,168.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.