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Finding the Fourth Proportional to 612.16, 917.56 and 265.24

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Solution

The fourth proportional to 612.16, 917.56 and 265.24 is: 397.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.16 : 917.56 = 265.24 : x
  2. Step 2: Convert to fraction form
    612.16/917.56 = 265.24/x
  3. Step 3: Cross multiply
    612.16x = 917.56 × 265.24
  4. Step 4: Simplify right side
    612.16x = 243,373.61
  5. Step 5: Solve for x
    x = 243,373.61/612.16
  6. Step 6: Final answer
    x = 397.57

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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.