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Finding the Fourth Proportional to 611.06, 915.50 and 507.74

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Solution

The fourth proportional to 611.06, 915.50 and 507.74 is: 760.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.06 : 915.50 = 507.74 : x
  2. Step 2: Convert to fraction form
    611.06/915.50 = 507.74/x
  3. Step 3: Cross multiply
    611.06x = 915.50 × 507.74
  4. Step 4: Simplify right side
    611.06x = 464,835.97
  5. Step 5: Solve for x
    x = 464,835.97/611.06
  6. Step 6: Final answer
    x = 760.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.