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Finding the Fourth Proportional to 1,677.05, 2,314.47 and 931.09

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Solution

The fourth proportional to 1,677.05, 2,314.47 and 931.09 is: 1,284.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.05 : 2,314.47 = 931.09 : x
  2. Step 2: Convert to fraction form
    1,677.05/2,314.47 = 931.09/x
  3. Step 3: Cross multiply
    1,677.05x = 2,314.47 × 931.09
  4. Step 4: Simplify right side
    1,677.05x = 2,154,979.87
  5. Step 5: Solve for x
    x = 2,154,979.87/1,677.05
  6. Step 6: Final answer
    x = 1,284.98

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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.