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Finding the Fourth Proportional to 1,449.48, 2,000.30 and 786.34

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Solution

The fourth proportional to 1,449.48, 2,000.30 and 786.34 is: 1,085.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.48 : 2,000.30 = 786.34 : x
  2. Step 2: Convert to fraction form
    1,449.48/2,000.30 = 786.34/x
  3. Step 3: Cross multiply
    1,449.48x = 2,000.30 × 786.34
  4. Step 4: Simplify right side
    1,449.48x = 1,572,915.90
  5. Step 5: Solve for x
    x = 1,572,915.90/1,449.48
  6. Step 6: Final answer
    x = 1,085.16

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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.