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Finding the Fourth Proportional to 621.08, 855.82 and 510.20

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Solution

The fourth proportional to 621.08, 855.82 and 510.20 is: 703.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.08 : 855.82 = 510.20 : x
  2. Step 2: Convert to fraction form
    621.08/855.82 = 510.20/x
  3. Step 3: Cross multiply
    621.08x = 855.82 × 510.20
  4. Step 4: Simplify right side
    621.08x = 436,639.36
  5. Step 5: Solve for x
    x = 436,639.36/621.08
  6. Step 6: Final answer
    x = 703.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.