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Finding the Fourth Proportional to 1,456.84, 2,185.08 and 430.84

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Solution

The fourth proportional to 1,456.84, 2,185.08 and 430.84 is: 646.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,456.84 : 2,185.08 = 430.84 : x
  2. Step 2: Convert to fraction form
    1,456.84/2,185.08 = 430.84/x
  3. Step 3: Cross multiply
    1,456.84x = 2,185.08 × 430.84
  4. Step 4: Simplify right side
    1,456.84x = 941,419.87
  5. Step 5: Solve for x
    x = 941,419.87/1,456.84
  6. Step 6: Final answer
    x = 646.21

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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.