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Finding the Fourth Proportional to 572.40, 856.44 and 435.24

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Solution

The fourth proportional to 572.40, 856.44 and 435.24 is: 651.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.40 : 856.44 = 435.24 : x
  2. Step 2: Convert to fraction form
    572.40/856.44 = 435.24/x
  3. Step 3: Cross multiply
    572.40x = 856.44 × 435.24
  4. Step 4: Simplify right side
    572.40x = 372,756.95
  5. Step 5: Solve for x
    x = 372,756.95/572.40
  6. Step 6: Final answer
    x = 651.22

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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.