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Finding the Fourth Proportional to 867.36, 1,301.25 and 290.28

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Solution

The fourth proportional to 867.36, 1,301.25 and 290.28 is: 435.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.36 : 1,301.25 = 290.28 : x
  2. Step 2: Convert to fraction form
    867.36/1,301.25 = 290.28/x
  3. Step 3: Cross multiply
    867.36x = 1,301.25 × 290.28
  4. Step 4: Simplify right side
    867.36x = 377,726.85
  5. Step 5: Solve for x
    x = 377,726.85/867.36
  6. Step 6: Final answer
    x = 435.49

Related Problems

Find fourth proportional to 433.68, 650.63 and 145.14
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.