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Finding the Fourth Proportional to 571.24, 855.42 and 433.72

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Solution

The fourth proportional to 571.24, 855.42 and 433.72 is: 649.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.24 : 855.42 = 433.72 : x
  2. Step 2: Convert to fraction form
    571.24/855.42 = 433.72/x
  3. Step 3: Cross multiply
    571.24x = 855.42 × 433.72
  4. Step 4: Simplify right side
    571.24x = 371,012.76
  5. Step 5: Solve for x
    x = 371,012.76/571.24
  6. Step 6: Final answer
    x = 649.49

Related Problems

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Half scale
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Double scale
Find fourth proportional to 572.24, 856.92 and 434.72
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.