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Finding the Fourth Proportional to 647.24, 969.62 and 545.16

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Solution

The fourth proportional to 647.24, 969.62 and 545.16 is: 816.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.24 : 969.62 = 545.16 : x
  2. Step 2: Convert to fraction form
    647.24/969.62 = 545.16/x
  3. Step 3: Cross multiply
    647.24x = 969.62 × 545.16
  4. Step 4: Simplify right side
    647.24x = 528,598.04
  5. Step 5: Solve for x
    x = 528,598.04/647.24
  6. Step 6: Final answer
    x = 816.70

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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.