Home / 2,547.20-3,820.80-1,248.40

Finding the Fourth Proportional to 2,547.20, 3,820.80 and 1,248.40

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Solution

The fourth proportional to 2,547.20, 3,820.80 and 1,248.40 is: 1,872.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.20 : 3,820.80 = 1,248.40 : x
  2. Step 2: Convert to fraction form
    2,547.20/3,820.80 = 1,248.40/x
  3. Step 3: Cross multiply
    2,547.20x = 3,820.80 × 1,248.40
  4. Step 4: Simplify right side
    2,547.20x = 4,769,886.72
  5. Step 5: Solve for x
    x = 4,769,886.72/2,547.20
  6. Step 6: Final answer
    x = 1,872.60

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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.