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Finding the Fourth Proportional to 1,505.64, 2,077.74 and 915.96

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Solution

The fourth proportional to 1,505.64, 2,077.74 and 915.96 is: 1,264.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.64 : 2,077.74 = 915.96 : x
  2. Step 2: Convert to fraction form
    1,505.64/2,077.74 = 915.96/x
  3. Step 3: Cross multiply
    1,505.64x = 2,077.74 × 915.96
  4. Step 4: Simplify right side
    1,505.64x = 1,903,126.73
  5. Step 5: Solve for x
    x = 1,903,126.73/1,505.64
  6. Step 6: Final answer
    x = 1,264.00

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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.