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Finding the Fourth Proportional to 649.29, 896.36 and 509.10

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Solution

The fourth proportional to 649.29, 896.36 and 509.10 is: 702.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.29 : 896.36 = 509.10 : x
  2. Step 2: Convert to fraction form
    649.29/896.36 = 509.10/x
  3. Step 3: Cross multiply
    649.29x = 896.36 × 509.10
  4. Step 4: Simplify right side
    649.29x = 456,336.88
  5. Step 5: Solve for x
    x = 456,336.88/649.29
  6. Step 6: Final answer
    x = 702.82

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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.