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Finding the Fourth Proportional to 1,417.78, 2,127.08 and 443.89

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Solution

The fourth proportional to 1,417.78, 2,127.08 and 443.89 is: 665.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.78 : 2,127.08 = 443.89 : x
  2. Step 2: Convert to fraction form
    1,417.78/2,127.08 = 443.89/x
  3. Step 3: Cross multiply
    1,417.78x = 2,127.08 × 443.89
  4. Step 4: Simplify right side
    1,417.78x = 944,189.54
  5. Step 5: Solve for x
    x = 944,189.54/1,417.78
  6. Step 6: Final answer
    x = 665.96

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1.5x scale

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.