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Finding the Fourth Proportional to 507.02, 699.71 and 307.89

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Solution

The fourth proportional to 507.02, 699.71 and 307.89 is: 424.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.02 : 699.71 = 307.89 : x
  2. Step 2: Convert to fraction form
    507.02/699.71 = 307.89/x
  3. Step 3: Cross multiply
    507.02x = 699.71 × 307.89
  4. Step 4: Simplify right side
    507.02x = 215,432.17
  5. Step 5: Solve for x
    x = 215,432.17/507.02
  6. Step 6: Final answer
    x = 424.90

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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.