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Finding the Fourth Proportional to 616.18, 920.05 and 612.58

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Solution

The fourth proportional to 616.18, 920.05 and 612.58 is: 914.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.18 : 920.05 = 612.58 : x
  2. Step 2: Convert to fraction form
    616.18/920.05 = 612.58/x
  3. Step 3: Cross multiply
    616.18x = 920.05 × 612.58
  4. Step 4: Simplify right side
    616.18x = 563,604.23
  5. Step 5: Solve for x
    x = 563,604.23/616.18
  6. Step 6: Final answer
    x = 914.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.