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Finding the Fourth Proportional to 616.34, 919.47 and 538.58

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Solution

The fourth proportional to 616.34, 919.47 and 538.58 is: 803.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.34 : 919.47 = 538.58 : x
  2. Step 2: Convert to fraction form
    616.34/919.47 = 538.58/x
  3. Step 3: Cross multiply
    616.34x = 919.47 × 538.58
  4. Step 4: Simplify right side
    616.34x = 495,205.46
  5. Step 5: Solve for x
    x = 495,205.46/616.34
  6. Step 6: Final answer
    x = 803.46

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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.