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Finding the Fourth Proportional to 1,646.61, 2,468.70 and 769.38

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Solution

The fourth proportional to 1,646.61, 2,468.70 and 769.38 is: 1,153.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.61 : 2,468.70 = 769.38 : x
  2. Step 2: Convert to fraction form
    1,646.61/2,468.70 = 769.38/x
  3. Step 3: Cross multiply
    1,646.61x = 2,468.70 × 769.38
  4. Step 4: Simplify right side
    1,646.61x = 1,899,368.41
  5. Step 5: Solve for x
    x = 1,899,368.41/1,646.61
  6. Step 6: Final answer
    x = 1,153.50

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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.