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Finding the Fourth Proportional to 510.42, 703.62 and 313.78

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Solution

The fourth proportional to 510.42, 703.62 and 313.78 is: 432.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.42 : 703.62 = 313.78 : x
  2. Step 2: Convert to fraction form
    510.42/703.62 = 313.78/x
  3. Step 3: Cross multiply
    510.42x = 703.62 × 313.78
  4. Step 4: Simplify right side
    510.42x = 220,781.88
  5. Step 5: Solve for x
    x = 220,781.88/510.42
  6. Step 6: Final answer
    x = 432.55

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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.