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Finding the Fourth Proportional to 477.21, 715.81 and 130.53

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Solution

The fourth proportional to 477.21, 715.81 and 130.53 is: 195.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.21 : 715.81 = 130.53 : x
  2. Step 2: Convert to fraction form
    477.21/715.81 = 130.53/x
  3. Step 3: Cross multiply
    477.21x = 715.81 × 130.53
  4. Step 4: Simplify right side
    477.21x = 93,437.10
  5. Step 5: Solve for x
    x = 93,437.10/477.21
  6. Step 6: Final answer
    x = 195.80

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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.