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Finding the Fourth Proportional to 611.69, 916.38 and 456.84

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Solution

The fourth proportional to 611.69, 916.38 and 456.84 is: 684.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.69 : 916.38 = 456.84 : x
  2. Step 2: Convert to fraction form
    611.69/916.38 = 456.84/x
  3. Step 3: Cross multiply
    611.69x = 916.38 × 456.84
  4. Step 4: Simplify right side
    611.69x = 418,639.04
  5. Step 5: Solve for x
    x = 418,639.04/611.69
  6. Step 6: Final answer
    x = 684.40

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1.5x scale

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.