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Finding the Fourth Proportional to 1,346.30, 1,857.66 and 756.86

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Solution

The fourth proportional to 1,346.30, 1,857.66 and 756.86 is: 1,044.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.30 : 1,857.66 = 756.86 : x
  2. Step 2: Convert to fraction form
    1,346.30/1,857.66 = 756.86/x
  3. Step 3: Cross multiply
    1,346.30x = 1,857.66 × 756.86
  4. Step 4: Simplify right side
    1,346.30x = 1,405,988.55
  5. Step 5: Solve for x
    x = 1,405,988.55/1,346.30
  6. Step 6: Final answer
    x = 1,044.34

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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.