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Finding the Fourth Proportional to 915.61, 1,374.27 and 504.18

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Solution

The fourth proportional to 915.61, 1,374.27 and 504.18 is: 756.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.61 : 1,374.27 = 504.18 : x
  2. Step 2: Convert to fraction form
    915.61/1,374.27 = 504.18/x
  3. Step 3: Cross multiply
    915.61x = 1,374.27 × 504.18
  4. Step 4: Simplify right side
    915.61x = 692,879.45
  5. Step 5: Solve for x
    x = 692,879.45/915.61
  6. Step 6: Final answer
    x = 756.74

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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.