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Finding the Fourth Proportional to 509.32, 693.46 and 507.70

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Solution

The fourth proportional to 509.32, 693.46 and 507.70 is: 691.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.32 : 693.46 = 507.70 : x
  2. Step 2: Convert to fraction form
    509.32/693.46 = 507.70/x
  3. Step 3: Cross multiply
    509.32x = 693.46 × 507.70
  4. Step 4: Simplify right side
    509.32x = 352,069.64
  5. Step 5: Solve for x
    x = 352,069.64/509.32
  6. Step 6: Final answer
    x = 691.25

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.