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Finding the Fourth Proportional to 504.15, 695.78 and 307.65

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Solution

The fourth proportional to 504.15, 695.78 and 307.65 is: 424.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.15 : 695.78 = 307.65 : x
  2. Step 2: Convert to fraction form
    504.15/695.78 = 307.65/x
  3. Step 3: Cross multiply
    504.15x = 695.78 × 307.65
  4. Step 4: Simplify right side
    504.15x = 214,056.72
  5. Step 5: Solve for x
    x = 214,056.72/504.15
  6. Step 6: Final answer
    x = 424.59

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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.