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Finding the Fourth Proportional to 1,078.02, 1,487.65 and 612.24

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Solution

The fourth proportional to 1,078.02, 1,487.65 and 612.24 is: 844.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.02 : 1,487.65 = 612.24 : x
  2. Step 2: Convert to fraction form
    1,078.02/1,487.65 = 612.24/x
  3. Step 3: Cross multiply
    1,078.02x = 1,487.65 × 612.24
  4. Step 4: Simplify right side
    1,078.02x = 910,798.84
  5. Step 5: Solve for x
    x = 910,798.84/1,078.02
  6. Step 6: Final answer
    x = 844.88

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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.