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Finding the Fourth Proportional to 647.55, 969.98 and 485.01

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Solution

The fourth proportional to 647.55, 969.98 and 485.01 is: 726.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.55 : 969.98 = 485.01 : x
  2. Step 2: Convert to fraction form
    647.55/969.98 = 485.01/x
  3. Step 3: Cross multiply
    647.55x = 969.98 × 485.01
  4. Step 4: Simplify right side
    647.55x = 470,447.57
  5. Step 5: Solve for x
    x = 470,447.57/647.55
  6. Step 6: Final answer
    x = 726.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.