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Finding the Fourth Proportional to 504.92, 692.65 and 491.40

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Solution

The fourth proportional to 504.92, 692.65 and 491.40 is: 674.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.92 : 692.65 = 491.40 : x
  2. Step 2: Convert to fraction form
    504.92/692.65 = 491.40/x
  3. Step 3: Cross multiply
    504.92x = 692.65 × 491.40
  4. Step 4: Simplify right side
    504.92x = 340,368.21
  5. Step 5: Solve for x
    x = 340,368.21/504.92
  6. Step 6: Final answer
    x = 674.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.