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Finding the Fourth Proportional to 3,031.69, 4,547.52 and 780.21

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Solution

The fourth proportional to 3,031.69, 4,547.52 and 780.21 is: 1,170.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,031.69 : 4,547.52 = 780.21 : x
  2. Step 2: Convert to fraction form
    3,031.69/4,547.52 = 780.21/x
  3. Step 3: Cross multiply
    3,031.69x = 4,547.52 × 780.21
  4. Step 4: Simplify right side
    3,031.69x = 3,548,020.58
  5. Step 5: Solve for x
    x = 3,548,020.58/3,031.69
  6. Step 6: Final answer
    x = 1,170.31

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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.