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Finding the Fourth Proportional to 632.55, 875.84 and 620.40

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Solution

The fourth proportional to 632.55, 875.84 and 620.40 is: 859.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.55 : 875.84 = 620.40 : x
  2. Step 2: Convert to fraction form
    632.55/875.84 = 620.40/x
  3. Step 3: Cross multiply
    632.55x = 875.84 × 620.40
  4. Step 4: Simplify right side
    632.55x = 543,368.03
  5. Step 5: Solve for x
    x = 543,368.03/632.55
  6. Step 6: Final answer
    x = 859.01

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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.