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Finding the Fourth Proportional to 612.73, 917.50 and 561.98

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Solution

The fourth proportional to 612.73, 917.50 and 561.98 is: 841.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.73 : 917.50 = 561.98 : x
  2. Step 2: Convert to fraction form
    612.73/917.50 = 561.98/x
  3. Step 3: Cross multiply
    612.73x = 917.50 × 561.98
  4. Step 4: Simplify right side
    612.73x = 515,616.65
  5. Step 5: Solve for x
    x = 515,616.65/612.73
  6. Step 6: Final answer
    x = 841.51

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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.