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Finding the Fourth Proportional to 612.06, 918.18 and 425.22

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Solution

The fourth proportional to 612.06, 918.18 and 425.22 is: 637.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.06 : 918.18 = 425.22 : x
  2. Step 2: Convert to fraction form
    612.06/918.18 = 425.22/x
  3. Step 3: Cross multiply
    612.06x = 918.18 × 425.22
  4. Step 4: Simplify right side
    612.06x = 390,428.50
  5. Step 5: Solve for x
    x = 390,428.50/612.06
  6. Step 6: Final answer
    x = 637.89

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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.