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Finding the Fourth Proportional to 510.32, 705.50 and 505.70

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Solution

The fourth proportional to 510.32, 705.50 and 505.70 is: 699.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.32 : 705.50 = 505.70 : x
  2. Step 2: Convert to fraction form
    510.32/705.50 = 505.70/x
  3. Step 3: Cross multiply
    510.32x = 705.50 × 505.70
  4. Step 4: Simplify right side
    510.32x = 356,771.35
  5. Step 5: Solve for x
    x = 356,771.35/510.32
  6. Step 6: Final answer
    x = 699.11

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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.