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Finding the Fourth Proportional to 491.35, 737.16 and 388.98

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Solution

The fourth proportional to 491.35, 737.16 and 388.98 is: 583.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.35 : 737.16 = 388.98 : x
  2. Step 2: Convert to fraction form
    491.35/737.16 = 388.98/x
  3. Step 3: Cross multiply
    491.35x = 737.16 × 388.98
  4. Step 4: Simplify right side
    491.35x = 286,736.81
  5. Step 5: Solve for x
    x = 286,736.81/491.35
  6. Step 6: Final answer
    x = 583.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.