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Finding the Fourth Proportional to 1,439.35, 1,987.10 and 967.93

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Solution

The fourth proportional to 1,439.35, 1,987.10 and 967.93 is: 1,336.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.35 : 1,987.10 = 967.93 : x
  2. Step 2: Convert to fraction form
    1,439.35/1,987.10 = 967.93/x
  3. Step 3: Cross multiply
    1,439.35x = 1,987.10 × 967.93
  4. Step 4: Simplify right side
    1,439.35x = 1,923,373.70
  5. Step 5: Solve for x
    x = 1,923,373.70/1,439.35
  6. Step 6: Final answer
    x = 1,336.28

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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.