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Finding the Fourth Proportional to 612.02, 917.26 and 286.67

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Solution

The fourth proportional to 612.02, 917.26 and 286.67 is: 429.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.02 : 917.26 = 286.67 : x
  2. Step 2: Convert to fraction form
    612.02/917.26 = 286.67/x
  3. Step 3: Cross multiply
    612.02x = 917.26 × 286.67
  4. Step 4: Simplify right side
    612.02x = 262,952.50
  5. Step 5: Solve for x
    x = 262,952.50/612.02
  6. Step 6: Final answer
    x = 429.65

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1.5x scale

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.