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Finding the Fourth Proportional to 342.16, 510.65 and 305.68

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Solution

The fourth proportional to 342.16, 510.65 and 305.68 is: 456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.16 : 510.65 = 305.68 : x
  2. Step 2: Convert to fraction form
    342.16/510.65 = 305.68/x
  3. Step 3: Cross multiply
    342.16x = 510.65 × 305.68
  4. Step 4: Simplify right side
    342.16x = 156,095.49
  5. Step 5: Solve for x
    x = 156,095.49/342.16
  6. Step 6: Final answer
    x = 456.21

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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.