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Finding the Fourth Proportional to 707.13, 976.40 and 498.00

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Solution

The fourth proportional to 707.13, 976.40 and 498.00 is: 687.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.13 : 976.40 = 498.00 : x
  2. Step 2: Convert to fraction form
    707.13/976.40 = 498.00/x
  3. Step 3: Cross multiply
    707.13x = 976.40 × 498.00
  4. Step 4: Simplify right side
    707.13x = 486,247.55
  5. Step 5: Solve for x
    x = 486,247.55/707.13
  6. Step 6: Final answer
    x = 687.64

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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.