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Finding the Fourth Proportional to 620.79, 931.59 and 560.04

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Solution

The fourth proportional to 620.79, 931.59 and 560.04 is: 840.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.79 : 931.59 = 560.04 : x
  2. Step 2: Convert to fraction form
    620.79/931.59 = 560.04/x
  3. Step 3: Cross multiply
    620.79x = 931.59 × 560.04
  4. Step 4: Simplify right side
    620.79x = 521,727.66
  5. Step 5: Solve for x
    x = 521,727.66/620.79
  6. Step 6: Final answer
    x = 840.43

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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.