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Finding the Fourth Proportional to 867.39, 1,299.06 and 433.50

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Solution

The fourth proportional to 867.39, 1,299.06 and 433.50 is: 649.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.39 : 1,299.06 = 433.50 : x
  2. Step 2: Convert to fraction form
    867.39/1,299.06 = 433.50/x
  3. Step 3: Cross multiply
    867.39x = 1,299.06 × 433.50
  4. Step 4: Simplify right side
    867.39x = 563,142.51
  5. Step 5: Solve for x
    x = 563,142.51/867.39
  6. Step 6: Final answer
    x = 649.24

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Half scale
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Double scale
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Similar ratio
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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.