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Finding the Fourth Proportional to 611.13, 915.48 and 494.99

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Solution

The fourth proportional to 611.13, 915.48 and 494.99 is: 741.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.13 : 915.48 = 494.99 : x
  2. Step 2: Convert to fraction form
    611.13/915.48 = 494.99/x
  3. Step 3: Cross multiply
    611.13x = 915.48 × 494.99
  4. Step 4: Simplify right side
    611.13x = 453,148.87
  5. Step 5: Solve for x
    x = 453,148.87/611.13
  6. Step 6: Final answer
    x = 741.49

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1.5x scale

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.