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Finding the Fourth Proportional to 501.68, 691.64 and 371.00

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Solution

The fourth proportional to 501.68, 691.64 and 371.00 is: 511.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.68 : 691.64 = 371.00 : x
  2. Step 2: Convert to fraction form
    501.68/691.64 = 371.00/x
  3. Step 3: Cross multiply
    501.68x = 691.64 × 371.00
  4. Step 4: Simplify right side
    501.68x = 256,599.71
  5. Step 5: Solve for x
    x = 256,599.71/501.68
  6. Step 6: Final answer
    x = 511.48

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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.