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Finding the Fourth Proportional to 914.93, 1,369.95 and 549.21

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Solution

The fourth proportional to 914.93, 1,369.95 and 549.21 is: 822.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.93 : 1,369.95 = 549.21 : x
  2. Step 2: Convert to fraction form
    914.93/1,369.95 = 549.21/x
  3. Step 3: Cross multiply
    914.93x = 1,369.95 × 549.21
  4. Step 4: Simplify right side
    914.93x = 752,390.24
  5. Step 5: Solve for x
    x = 752,390.24/914.93
  6. Step 6: Final answer
    x = 822.35

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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.