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Finding the Fourth Proportional to 985.58, 1,358.23 and 705.33

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Solution

The fourth proportional to 985.58, 1,358.23 and 705.33 is: 972.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.58 : 1,358.23 = 705.33 : x
  2. Step 2: Convert to fraction form
    985.58/1,358.23 = 705.33/x
  3. Step 3: Cross multiply
    985.58x = 1,358.23 × 705.33
  4. Step 4: Simplify right side
    985.58x = 958,000.37
  5. Step 5: Solve for x
    x = 958,000.37/985.58
  6. Step 6: Final answer
    x = 972.02

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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.