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Finding the Fourth Proportional to 714.02, 1,070.62 and 281.07

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Solution

The fourth proportional to 714.02, 1,070.62 and 281.07 is: 421.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.02 : 1,070.62 = 281.07 : x
  2. Step 2: Convert to fraction form
    714.02/1,070.62 = 281.07/x
  3. Step 3: Cross multiply
    714.02x = 1,070.62 × 281.07
  4. Step 4: Simplify right side
    714.02x = 300,918.46
  5. Step 5: Solve for x
    x = 300,918.46/714.02
  6. Step 6: Final answer
    x = 421.45

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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.