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Finding the Fourth Proportional to 501.71, 692.18 and 291.81

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Solution

The fourth proportional to 501.71, 692.18 and 291.81 is: 402.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.71 : 692.18 = 291.81 : x
  2. Step 2: Convert to fraction form
    501.71/692.18 = 291.81/x
  3. Step 3: Cross multiply
    501.71x = 692.18 × 291.81
  4. Step 4: Simplify right side
    501.71x = 201,985.41
  5. Step 5: Solve for x
    x = 201,985.41/501.71
  6. Step 6: Final answer
    x = 402.59

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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.