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Finding the Fourth Proportional to 835.68, 1,153.92 and 705.12

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Solution

The fourth proportional to 835.68, 1,153.92 and 705.12 is: 973.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.68 : 1,153.92 = 705.12 : x
  2. Step 2: Convert to fraction form
    835.68/1,153.92 = 705.12/x
  3. Step 3: Cross multiply
    835.68x = 1,153.92 × 705.12
  4. Step 4: Simplify right side
    835.68x = 813,652.07
  5. Step 5: Solve for x
    x = 813,652.07/835.68
  6. Step 6: Final answer
    x = 973.64

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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.