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Finding the Fourth Proportional to 190.04, 284.76 and 87.20

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Solution

The fourth proportional to 190.04, 284.76 and 87.20 is: 130.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.04 : 284.76 = 87.20 : x
  2. Step 2: Convert to fraction form
    190.04/284.76 = 87.20/x
  3. Step 3: Cross multiply
    190.04x = 284.76 × 87.20
  4. Step 4: Simplify right side
    190.04x = 24,831.07
  5. Step 5: Solve for x
    x = 24,831.07/190.04
  6. Step 6: Final answer
    x = 130.66

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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.