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Finding the Fourth Proportional to 621.64, 855.71 and 537.58

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Solution

The fourth proportional to 621.64, 855.71 and 537.58 is: 740.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.64 : 855.71 = 537.58 : x
  2. Step 2: Convert to fraction form
    621.64/855.71 = 537.58/x
  3. Step 3: Cross multiply
    621.64x = 855.71 × 537.58
  4. Step 4: Simplify right side
    621.64x = 460,012.58
  5. Step 5: Solve for x
    x = 460,012.58/621.64
  6. Step 6: Final answer
    x = 740.00

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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.