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Finding the Fourth Proportional to 651.28, 972.50 and 578.32

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Solution

The fourth proportional to 651.28, 972.50 and 578.32 is: 863.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.28 : 972.50 = 578.32 : x
  2. Step 2: Convert to fraction form
    651.28/972.50 = 578.32/x
  3. Step 3: Cross multiply
    651.28x = 972.50 × 578.32
  4. Step 4: Simplify right side
    651.28x = 562,416.20
  5. Step 5: Solve for x
    x = 562,416.20/651.28
  6. Step 6: Final answer
    x = 863.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.