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Finding the Fourth Proportional to 647.46, 965.58 and 603.72

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Solution

The fourth proportional to 647.46, 965.58 and 603.72 is: 900.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.46 : 965.58 = 603.72 : x
  2. Step 2: Convert to fraction form
    647.46/965.58 = 603.72/x
  3. Step 3: Cross multiply
    647.46x = 965.58 × 603.72
  4. Step 4: Simplify right side
    647.46x = 582,939.96
  5. Step 5: Solve for x
    x = 582,939.96/647.46
  6. Step 6: Final answer
    x = 900.35

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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.