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Finding the Fourth Proportional to 985.23, 1,358.64 and 592.20

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Solution

The fourth proportional to 985.23, 1,358.64 and 592.20 is: 816.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.23 : 1,358.64 = 592.20 : x
  2. Step 2: Convert to fraction form
    985.23/1,358.64 = 592.20/x
  3. Step 3: Cross multiply
    985.23x = 1,358.64 × 592.20
  4. Step 4: Simplify right side
    985.23x = 804,586.61
  5. Step 5: Solve for x
    x = 804,586.61/985.23
  6. Step 6: Final answer
    x = 816.65

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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.