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Finding the Fourth Proportional to 1,297.79, 1,946.85 and 476.45

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Solution

The fourth proportional to 1,297.79, 1,946.85 and 476.45 is: 714.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.79 : 1,946.85 = 476.45 : x
  2. Step 2: Convert to fraction form
    1,297.79/1,946.85 = 476.45/x
  3. Step 3: Cross multiply
    1,297.79x = 1,946.85 × 476.45
  4. Step 4: Simplify right side
    1,297.79x = 927,576.68
  5. Step 5: Solve for x
    x = 927,576.68/1,297.79
  6. Step 6: Final answer
    x = 714.74

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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.