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Finding the Fourth Proportional to 1,475.79, 2,036.97 and 915.93

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Solution

The fourth proportional to 1,475.79, 2,036.97 and 915.93 is: 1,264.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.79 : 2,036.97 = 915.93 : x
  2. Step 2: Convert to fraction form
    1,475.79/2,036.97 = 915.93/x
  3. Step 3: Cross multiply
    1,475.79x = 2,036.97 × 915.93
  4. Step 4: Simplify right side
    1,475.79x = 1,865,721.93
  5. Step 5: Solve for x
    x = 1,865,721.93/1,475.79
  6. Step 6: Final answer
    x = 1,264.22

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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.