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Finding the Fourth Proportional to 647.55, 893.40 and 367.76

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Solution

The fourth proportional to 647.55, 893.40 and 367.76 is: 507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.55 : 893.40 = 367.76 : x
  2. Step 2: Convert to fraction form
    647.55/893.40 = 367.76/x
  3. Step 3: Cross multiply
    647.55x = 893.40 × 367.76
  4. Step 4: Simplify right side
    647.55x = 328,552.32
  5. Step 5: Solve for x
    x = 328,552.32/647.55
  6. Step 6: Final answer
    x = 507.38

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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.