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Finding the Fourth Proportional to 652.67, 977.26 and 391.45

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Solution

The fourth proportional to 652.67, 977.26 and 391.45 is: 586.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.67 : 977.26 = 391.45 : x
  2. Step 2: Convert to fraction form
    652.67/977.26 = 391.45/x
  3. Step 3: Cross multiply
    652.67x = 977.26 × 391.45
  4. Step 4: Simplify right side
    652.67x = 382,548.43
  5. Step 5: Solve for x
    x = 382,548.43/652.67
  6. Step 6: Final answer
    x = 586.13

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Why These Related Problems?

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