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Finding the Fourth Proportional to 999.02, 1,497.40 and 478.30

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Solution

The fourth proportional to 999.02, 1,497.40 and 478.30 is: 716.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.02 : 1,497.40 = 478.30 : x
  2. Step 2: Convert to fraction form
    999.02/1,497.40 = 478.30/x
  3. Step 3: Cross multiply
    999.02x = 1,497.40 × 478.30
  4. Step 4: Simplify right side
    999.02x = 716,201.48
  5. Step 5: Solve for x
    x = 716,201.48/999.02
  6. Step 6: Final answer
    x = 716.91

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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.