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Finding the Fourth Proportional to 612.51, 918.93 and 355.83

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Solution

The fourth proportional to 612.51, 918.93 and 355.83 is: 533.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.51 : 918.93 = 355.83 : x
  2. Step 2: Convert to fraction form
    612.51/918.93 = 355.83/x
  3. Step 3: Cross multiply
    612.51x = 918.93 × 355.83
  4. Step 4: Simplify right side
    612.51x = 326,982.86
  5. Step 5: Solve for x
    x = 326,982.86/612.51
  6. Step 6: Final answer
    x = 533.84

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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.