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Finding the Fourth Proportional to 3,031.87, 4,547.30 and 840.82

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Solution

The fourth proportional to 3,031.87, 4,547.30 and 840.82 is: 1,261.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,031.87 : 4,547.30 = 840.82 : x
  2. Step 2: Convert to fraction form
    3,031.87/4,547.30 = 840.82/x
  3. Step 3: Cross multiply
    3,031.87x = 4,547.30 × 840.82
  4. Step 4: Simplify right side
    3,031.87x = 3,823,460.79
  5. Step 5: Solve for x
    x = 3,823,460.79/3,031.87
  6. Step 6: Final answer
    x = 1,261.09

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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.