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Finding the Fourth Proportional to 612.66, 918.74 and 247.35

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Solution

The fourth proportional to 612.66, 918.74 and 247.35 is: 370.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.66 : 918.74 = 247.35 : x
  2. Step 2: Convert to fraction form
    612.66/918.74 = 247.35/x
  3. Step 3: Cross multiply
    612.66x = 918.74 × 247.35
  4. Step 4: Simplify right side
    612.66x = 227,254.40
  5. Step 5: Solve for x
    x = 227,254.40/612.66
  6. Step 6: Final answer
    x = 370.93

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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.