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Finding the Fourth Proportional to 717.37, 990.35 and 507.72

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Solution

The fourth proportional to 717.37, 990.35 and 507.72 is: 700.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.37 : 990.35 = 507.72 : x
  2. Step 2: Convert to fraction form
    717.37/990.35 = 507.72/x
  3. Step 3: Cross multiply
    717.37x = 990.35 × 507.72
  4. Step 4: Simplify right side
    717.37x = 502,820.50
  5. Step 5: Solve for x
    x = 502,820.50/717.37
  6. Step 6: Final answer
    x = 700.92

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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.