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Finding the Fourth Proportional to 1,031.83, 1,547.79 and 338.21

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Solution

The fourth proportional to 1,031.83, 1,547.79 and 338.21 is: 507.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.83 : 1,547.79 = 338.21 : x
  2. Step 2: Convert to fraction form
    1,031.83/1,547.79 = 338.21/x
  3. Step 3: Cross multiply
    1,031.83x = 1,547.79 × 338.21
  4. Step 4: Simplify right side
    1,031.83x = 523,485.46
  5. Step 5: Solve for x
    x = 523,485.46/1,031.83
  6. Step 6: Final answer
    x = 507.34

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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.