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Finding the Fourth Proportional to 965.72, 1,448.58 and 389.00

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Solution

The fourth proportional to 965.72, 1,448.58 and 389.00 is: 583.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.72 : 1,448.58 = 389.00 : x
  2. Step 2: Convert to fraction form
    965.72/1,448.58 = 389.00/x
  3. Step 3: Cross multiply
    965.72x = 1,448.58 × 389.00
  4. Step 4: Simplify right side
    965.72x = 563,502.70
  5. Step 5: Solve for x
    x = 563,502.70/965.72
  6. Step 6: Final answer
    x = 583.50

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Half scale
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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.