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Finding the Fourth Proportional to 818.48, 1,225.74 and 493.13

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Solution

The fourth proportional to 818.48, 1,225.74 and 493.13 is: 738.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.48 : 1,225.74 = 493.13 : x
  2. Step 2: Convert to fraction form
    818.48/1,225.74 = 493.13/x
  3. Step 3: Cross multiply
    818.48x = 1,225.74 × 493.13
  4. Step 4: Simplify right side
    818.48x = 604,449.17
  5. Step 5: Solve for x
    x = 604,449.17/818.48
  6. Step 6: Final answer
    x = 738.50

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Half scale
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Double scale
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1.5x scale

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.