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Finding the Fourth Proportional to 503.20, 756.60 and 492.40

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Solution

The fourth proportional to 503.20, 756.60 and 492.40 is: 740.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.20 : 756.60 = 492.40 : x
  2. Step 2: Convert to fraction form
    503.20/756.60 = 492.40/x
  3. Step 3: Cross multiply
    503.20x = 756.60 × 492.40
  4. Step 4: Simplify right side
    503.20x = 372,549.84
  5. Step 5: Solve for x
    x = 372,549.84/503.20
  6. Step 6: Final answer
    x = 740.36

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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.