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Finding the Fourth Proportional to 808.99, 1,116.40 and 459.67

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Solution

The fourth proportional to 808.99, 1,116.40 and 459.67 is: 634.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.99 : 1,116.40 = 459.67 : x
  2. Step 2: Convert to fraction form
    808.99/1,116.40 = 459.67/x
  3. Step 3: Cross multiply
    808.99x = 1,116.40 × 459.67
  4. Step 4: Simplify right side
    808.99x = 513,177.23
  5. Step 5: Solve for x
    x = 513,177.23/808.99
  6. Step 6: Final answer
    x = 634.35

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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.