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Finding the Fourth Proportional to 3,339.72, 5,010.90 and 1,031.40

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Solution

The fourth proportional to 3,339.72, 5,010.90 and 1,031.40 is: 1,547.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,339.72 : 5,010.90 = 1,031.40 : x
  2. Step 2: Convert to fraction form
    3,339.72/5,010.90 = 1,031.40/x
  3. Step 3: Cross multiply
    3,339.72x = 5,010.90 × 1,031.40
  4. Step 4: Simplify right side
    3,339.72x = 5,168,242.26
  5. Step 5: Solve for x
    x = 5,168,242.26/3,339.72
  6. Step 6: Final answer
    x = 1,547.51

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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.