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Finding the Fourth Proportional to 1,276.99, 1,915.89 and 497.32

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Solution

The fourth proportional to 1,276.99, 1,915.89 and 497.32 is: 746.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.99 : 1,915.89 = 497.32 : x
  2. Step 2: Convert to fraction form
    1,276.99/1,915.89 = 497.32/x
  3. Step 3: Cross multiply
    1,276.99x = 1,915.89 × 497.32
  4. Step 4: Simplify right side
    1,276.99x = 952,810.41
  5. Step 5: Solve for x
    x = 952,810.41/1,276.99
  6. Step 6: Final answer
    x = 746.14

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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.