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Finding the Fourth Proportional to 1,366.14, 1,885.28 and 776.87

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Solution

The fourth proportional to 1,366.14, 1,885.28 and 776.87 is: 1,072.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.14 : 1,885.28 = 776.87 : x
  2. Step 2: Convert to fraction form
    1,366.14/1,885.28 = 776.87/x
  3. Step 3: Cross multiply
    1,366.14x = 1,885.28 × 776.87
  4. Step 4: Simplify right side
    1,366.14x = 1,464,617.47
  5. Step 5: Solve for x
    x = 1,464,617.47/1,366.14
  6. Step 6: Final answer
    x = 1,072.08

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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.