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Finding the Fourth Proportional to 715.07, 985.74 and 504.56

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Solution

The fourth proportional to 715.07, 985.74 and 504.56 is: 695.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.07 : 985.74 = 504.56 : x
  2. Step 2: Convert to fraction form
    715.07/985.74 = 504.56/x
  3. Step 3: Cross multiply
    715.07x = 985.74 × 504.56
  4. Step 4: Simplify right side
    715.07x = 497,364.97
  5. Step 5: Solve for x
    x = 497,364.97/715.07
  6. Step 6: Final answer
    x = 695.55

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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.