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Finding the Fourth Proportional to 614.93, 916.79 and 556.61

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Solution

The fourth proportional to 614.93, 916.79 and 556.61 is: 829.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.93 : 916.79 = 556.61 : x
  2. Step 2: Convert to fraction form
    614.93/916.79 = 556.61/x
  3. Step 3: Cross multiply
    614.93x = 916.79 × 556.61
  4. Step 4: Simplify right side
    614.93x = 510,287.11
  5. Step 5: Solve for x
    x = 510,287.11/614.93
  6. Step 6: Final answer
    x = 829.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.