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Finding the Fourth Proportional to 342.02, 510.53 and 320.66

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Solution

The fourth proportional to 342.02, 510.53 and 320.66 is: 478.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.02 : 510.53 = 320.66 : x
  2. Step 2: Convert to fraction form
    342.02/510.53 = 320.66/x
  3. Step 3: Cross multiply
    342.02x = 510.53 × 320.66
  4. Step 4: Simplify right side
    342.02x = 163,706.55
  5. Step 5: Solve for x
    x = 163,706.55/342.02
  6. Step 6: Final answer
    x = 478.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.