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Finding the Fourth Proportional to 699.84, 1,051.20 and 585.12

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Solution

The fourth proportional to 699.84, 1,051.20 and 585.12 is: 878.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.84 : 1,051.20 = 585.12 : x
  2. Step 2: Convert to fraction form
    699.84/1,051.20 = 585.12/x
  3. Step 3: Cross multiply
    699.84x = 1,051.20 × 585.12
  4. Step 4: Simplify right side
    699.84x = 615,078.14
  5. Step 5: Solve for x
    x = 615,078.14/699.84
  6. Step 6: Final answer
    x = 878.88

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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.