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Finding the Fourth Proportional to 651.16, 898.58 and 385.60

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Solution

The fourth proportional to 651.16, 898.58 and 385.60 is: 532.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.16 : 898.58 = 385.60 : x
  2. Step 2: Convert to fraction form
    651.16/898.58 = 385.60/x
  3. Step 3: Cross multiply
    651.16x = 898.58 × 385.60
  4. Step 4: Simplify right side
    651.16x = 346,492.45
  5. Step 5: Solve for x
    x = 346,492.45/651.16
  6. Step 6: Final answer
    x = 532.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.