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Finding the Fourth Proportional to 621.79, 933.09 and 561.04

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Solution

The fourth proportional to 621.79, 933.09 and 561.04 is: 841.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.79 : 933.09 = 561.04 : x
  2. Step 2: Convert to fraction form
    621.79/933.09 = 561.04/x
  3. Step 3: Cross multiply
    621.79x = 933.09 × 561.04
  4. Step 4: Simplify right side
    621.79x = 523,500.81
  5. Step 5: Solve for x
    x = 523,500.81/621.79
  6. Step 6: Final answer
    x = 841.93

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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.