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Finding the Fourth Proportional to 1,385.42, 2,078.58 and 564.18

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Solution

The fourth proportional to 1,385.42, 2,078.58 and 564.18 is: 846.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.42 : 2,078.58 = 564.18 : x
  2. Step 2: Convert to fraction form
    1,385.42/2,078.58 = 564.18/x
  3. Step 3: Cross multiply
    1,385.42x = 2,078.58 × 564.18
  4. Step 4: Simplify right side
    1,385.42x = 1,172,693.26
  5. Step 5: Solve for x
    x = 1,172,693.26/1,385.42
  6. Step 6: Final answer
    x = 846.46

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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.