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Finding the Fourth Proportional to 459.13, 688.69 and 436.06

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Solution

The fourth proportional to 459.13, 688.69 and 436.06 is: 654.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.13 : 688.69 = 436.06 : x
  2. Step 2: Convert to fraction form
    459.13/688.69 = 436.06/x
  3. Step 3: Cross multiply
    459.13x = 688.69 × 436.06
  4. Step 4: Simplify right side
    459.13x = 300,305.63
  5. Step 5: Solve for x
    x = 300,305.63/459.13
  6. Step 6: Final answer
    x = 654.08

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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.