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Finding the Fourth Proportional to 370.24, 510.72 and 320.80

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Solution

The fourth proportional to 370.24, 510.72 and 320.80 is: 442.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.24 : 510.72 = 320.80 : x
  2. Step 2: Convert to fraction form
    370.24/510.72 = 320.80/x
  3. Step 3: Cross multiply
    370.24x = 510.72 × 320.80
  4. Step 4: Simplify right side
    370.24x = 163,838.98
  5. Step 5: Solve for x
    x = 163,838.98/370.24
  6. Step 6: Final answer
    x = 442.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.