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Finding the Fourth Proportional to 616.40, 923.28 and 290.98

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Solution

The fourth proportional to 616.40, 923.28 and 290.98 is: 435.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.40 : 923.28 = 290.98 : x
  2. Step 2: Convert to fraction form
    616.40/923.28 = 290.98/x
  3. Step 3: Cross multiply
    616.40x = 923.28 × 290.98
  4. Step 4: Simplify right side
    616.40x = 268,656.01
  5. Step 5: Solve for x
    x = 268,656.01/616.40
  6. Step 6: Final answer
    x = 435.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.