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Finding the Fourth Proportional to 1,063.42, 1,467.01 and 915.80

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Solution

The fourth proportional to 1,063.42, 1,467.01 and 915.80 is: 1,263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.42 : 1,467.01 = 915.80 : x
  2. Step 2: Convert to fraction form
    1,063.42/1,467.01 = 915.80/x
  3. Step 3: Cross multiply
    1,063.42x = 1,467.01 × 915.80
  4. Step 4: Simplify right side
    1,063.42x = 1,343,478.13
  5. Step 5: Solve for x
    x = 1,343,478.13/1,063.42
  6. Step 6: Final answer
    x = 1,263.36

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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.