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Finding the Fourth Proportional to 1,417.86, 2,126.70 and 443.94

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Solution

The fourth proportional to 1,417.86, 2,126.70 and 443.94 is: 665.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.86 : 2,126.70 = 443.94 : x
  2. Step 2: Convert to fraction form
    1,417.86/2,126.70 = 443.94/x
  3. Step 3: Cross multiply
    1,417.86x = 2,126.70 × 443.94
  4. Step 4: Simplify right side
    1,417.86x = 944,127.20
  5. Step 5: Solve for x
    x = 944,127.20/1,417.86
  6. Step 6: Final answer
    x = 665.88

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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.