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Finding the Fourth Proportional to 612.20, 914.14 and 557.48

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Solution

The fourth proportional to 612.20, 914.14 and 557.48 is: 832.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.20 : 914.14 = 557.48 : x
  2. Step 2: Convert to fraction form
    612.20/914.14 = 557.48/x
  3. Step 3: Cross multiply
    612.20x = 914.14 × 557.48
  4. Step 4: Simplify right side
    612.20x = 509,614.77
  5. Step 5: Solve for x
    x = 509,614.77/612.20
  6. Step 6: Final answer
    x = 832.43

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1.5x scale

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.