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Finding the Fourth Proportional to 509.43, 703.14 and 307.69

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Solution

The fourth proportional to 509.43, 703.14 and 307.69 is: 424.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.43 : 703.14 = 307.69 : x
  2. Step 2: Convert to fraction form
    509.43/703.14 = 307.69/x
  3. Step 3: Cross multiply
    509.43x = 703.14 × 307.69
  4. Step 4: Simplify right side
    509.43x = 216,349.15
  5. Step 5: Solve for x
    x = 216,349.15/509.43
  6. Step 6: Final answer
    x = 424.69

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Double scale
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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.