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Finding the Fourth Proportional to 657.86, 981.99 and 608.99

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Solution

The fourth proportional to 657.86, 981.99 and 608.99 is: 909.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.86 : 981.99 = 608.99 : x
  2. Step 2: Convert to fraction form
    657.86/981.99 = 608.99/x
  3. Step 3: Cross multiply
    657.86x = 981.99 × 608.99
  4. Step 4: Simplify right side
    657.86x = 598,017.18
  5. Step 5: Solve for x
    x = 598,017.18/657.86
  6. Step 6: Final answer
    x = 909.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.