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Finding the Fourth Proportional to 621.51, 933.18 and 619.68

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Solution

The fourth proportional to 621.51, 933.18 and 619.68 is: 930.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.51 : 933.18 = 619.68 : x
  2. Step 2: Convert to fraction form
    621.51/933.18 = 619.68/x
  3. Step 3: Cross multiply
    621.51x = 933.18 × 619.68
  4. Step 4: Simplify right side
    621.51x = 578,272.98
  5. Step 5: Solve for x
    x = 578,272.98/621.51
  6. Step 6: Final answer
    x = 930.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.