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Finding the Fourth Proportional to 663.86, 916.15 and 365.11

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Solution

The fourth proportional to 663.86, 916.15 and 365.11 is: 503.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.86 : 916.15 = 365.11 : x
  2. Step 2: Convert to fraction form
    663.86/916.15 = 365.11/x
  3. Step 3: Cross multiply
    663.86x = 916.15 × 365.11
  4. Step 4: Simplify right side
    663.86x = 334,495.53
  5. Step 5: Solve for x
    x = 334,495.53/663.86
  6. Step 6: Final answer
    x = 503.86

Related Problems

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Double scale
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1.5x scale

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.