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Finding the Fourth Proportional to 1,349.94, 1,862.97 and 790.32

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Solution

The fourth proportional to 1,349.94, 1,862.97 and 790.32 is: 1,090.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.94 : 1,862.97 = 790.32 : x
  2. Step 2: Convert to fraction form
    1,349.94/1,862.97 = 790.32/x
  3. Step 3: Cross multiply
    1,349.94x = 1,862.97 × 790.32
  4. Step 4: Simplify right side
    1,349.94x = 1,472,342.45
  5. Step 5: Solve for x
    x = 1,472,342.45/1,349.94
  6. Step 6: Final answer
    x = 1,090.67

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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.