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Finding the Fourth Proportional to 340.86, 510.65 and 285.68

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Solution

The fourth proportional to 340.86, 510.65 and 285.68 is: 427.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.86 : 510.65 = 285.68 : x
  2. Step 2: Convert to fraction form
    340.86/510.65 = 285.68/x
  3. Step 3: Cross multiply
    340.86x = 510.65 × 285.68
  4. Step 4: Simplify right side
    340.86x = 145,882.15
  5. Step 5: Solve for x
    x = 145,882.15/340.86
  6. Step 6: Final answer
    x = 427.98

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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.