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Finding the Fourth Proportional to 965.85, 1,448.70 and 553.69

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Solution

The fourth proportional to 965.85, 1,448.70 and 553.69 is: 830.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.85 : 1,448.70 = 553.69 : x
  2. Step 2: Convert to fraction form
    965.85/1,448.70 = 553.69/x
  3. Step 3: Cross multiply
    965.85x = 1,448.70 × 553.69
  4. Step 4: Simplify right side
    965.85x = 802,130.70
  5. Step 5: Solve for x
    x = 802,130.70/965.85
  6. Step 6: Final answer
    x = 830.49

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Half scale
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Double scale
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1.5x scale

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.