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Finding the Fourth Proportional to 615.63, 916.74 and 608.81

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Solution

The fourth proportional to 615.63, 916.74 and 608.81 is: 906.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.63 : 916.74 = 608.81 : x
  2. Step 2: Convert to fraction form
    615.63/916.74 = 608.81/x
  3. Step 3: Cross multiply
    615.63x = 916.74 × 608.81
  4. Step 4: Simplify right side
    615.63x = 558,117.44
  5. Step 5: Solve for x
    x = 558,117.44/615.63
  6. Step 6: Final answer
    x = 906.58

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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.