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Finding the Fourth Proportional to 612.43, 914.36 and 555.05

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Solution

The fourth proportional to 612.43, 914.36 and 555.05 is: 828.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.43 : 914.36 = 555.05 : x
  2. Step 2: Convert to fraction form
    612.43/914.36 = 555.05/x
  3. Step 3: Cross multiply
    612.43x = 914.36 × 555.05
  4. Step 4: Simplify right side
    612.43x = 507,515.03
  5. Step 5: Solve for x
    x = 507,515.03/612.43
  6. Step 6: Final answer
    x = 828.69

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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.