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Finding the Fourth Proportional to 614.18, 916.43 and 555.42

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Solution

The fourth proportional to 614.18, 916.43 and 555.42 is: 828.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.18 : 916.43 = 555.42 : x
  2. Step 2: Convert to fraction form
    614.18/916.43 = 555.42/x
  3. Step 3: Cross multiply
    614.18x = 916.43 × 555.42
  4. Step 4: Simplify right side
    614.18x = 509,000.77
  5. Step 5: Solve for x
    x = 509,000.77/614.18
  6. Step 6: Final answer
    x = 828.76

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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.